Commit | Line | Data |
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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> |
1e2c2a4f SE |
35 | #include <linux/netdevice.h> |
36 | #include <linux/pkt_sched.h> | |
37 | #include <linux/printk.h> | |
38 | #include <linux/random.h> | |
39 | #include <linux/rculist.h> | |
40 | #include <linux/rcupdate.h> | |
41 | #include <linux/seq_file.h> | |
42 | #include <linux/skbuff.h> | |
43 | #include <linux/slab.h> | |
44 | #include <linux/spinlock.h> | |
45 | #include <linux/stddef.h> | |
46 | #include <linux/string.h> | |
47 | #include <linux/types.h> | |
48 | #include <linux/workqueue.h> | |
49 | ||
50 | #include "bitarray.h" | |
51 | #include "hard-interface.h" | |
52 | #include "hash.h" | |
53 | #include "network-coding.h" | |
fc957275 | 54 | #include "originator.h" |
1e2c2a4f | 55 | #include "packet.h" |
fc957275 | 56 | #include "routing.h" |
fc957275 | 57 | #include "send.h" |
1e2c2a4f | 58 | #include "translation-table.h" |
fc957275 | 59 | |
791c2a2d | 60 | /** |
95298a91 | 61 | * enum batadv_dup_status - duplicate status |
9f52ee19 | 62 | * @BATADV_NO_DUP: the packet is no duplicate |
791c2a2d AQ |
63 | * @BATADV_ORIG_DUP: OGM is a duplicate in the originator (but not for the |
64 | * neighbor) | |
65 | * @BATADV_NEIGH_DUP: OGM is a duplicate for the neighbor | |
66 | * @BATADV_PROTECTED: originator is currently protected (after reboot) | |
67 | */ | |
68 | enum batadv_dup_status { | |
69 | BATADV_NO_DUP = 0, | |
70 | BATADV_ORIG_DUP, | |
71 | BATADV_NEIGH_DUP, | |
72 | BATADV_PROTECTED, | |
73 | }; | |
74 | ||
24a5deeb AQ |
75 | /** |
76 | * batadv_ring_buffer_set - update the ring buffer with the given value | |
77 | * @lq_recv: pointer to the ring buffer | |
78 | * @lq_index: index to store the value at | |
79 | * @value: value to store in the ring buffer | |
80 | */ | |
6b5e971a | 81 | static void batadv_ring_buffer_set(u8 lq_recv[], u8 *lq_index, u8 value) |
24a5deeb AQ |
82 | { |
83 | lq_recv[*lq_index] = value; | |
84 | *lq_index = (*lq_index + 1) % BATADV_TQ_GLOBAL_WINDOW_SIZE; | |
85 | } | |
86 | ||
87 | /** | |
d491dbb6 | 88 | * batadv_ring_buffer_avg - compute the average of all non-zero values stored |
24a5deeb AQ |
89 | * in the given ring buffer |
90 | * @lq_recv: pointer to the ring buffer | |
91 | * | |
62fe710f | 92 | * Return: computed average value. |
24a5deeb | 93 | */ |
6b5e971a | 94 | static u8 batadv_ring_buffer_avg(const u8 lq_recv[]) |
24a5deeb | 95 | { |
6b5e971a SE |
96 | const u8 *ptr; |
97 | u16 count = 0; | |
98 | u16 i = 0; | |
99 | u16 sum = 0; | |
24a5deeb AQ |
100 | |
101 | ptr = lq_recv; | |
102 | ||
103 | while (i < BATADV_TQ_GLOBAL_WINDOW_SIZE) { | |
104 | if (*ptr != 0) { | |
105 | count++; | |
106 | sum += *ptr; | |
107 | } | |
108 | ||
109 | i++; | |
110 | ptr++; | |
111 | } | |
112 | ||
113 | if (count == 0) | |
114 | return 0; | |
115 | ||
6b5e971a | 116 | return (u8)(sum / count); |
24a5deeb | 117 | } |
d98cae64 | 118 | |
d0015fdd AQ |
119 | /** |
120 | * batadv_iv_ogm_orig_free - free the private resources allocated for this | |
121 | * orig_node | |
122 | * @orig_node: the orig_node for which the resources have to be free'd | |
123 | */ | |
124 | static void batadv_iv_ogm_orig_free(struct batadv_orig_node *orig_node) | |
125 | { | |
126 | kfree(orig_node->bat_iv.bcast_own); | |
127 | kfree(orig_node->bat_iv.bcast_own_sum); | |
128 | } | |
129 | ||
130 | /** | |
131 | * batadv_iv_ogm_orig_add_if - change the private structures of the orig_node to | |
132 | * include the new hard-interface | |
133 | * @orig_node: the orig_node that has to be changed | |
134 | * @max_if_num: the current amount of interfaces | |
135 | * | |
62fe710f | 136 | * Return: 0 on success, a negative error code otherwise. |
d0015fdd AQ |
137 | */ |
138 | static int batadv_iv_ogm_orig_add_if(struct batadv_orig_node *orig_node, | |
139 | int max_if_num) | |
140 | { | |
141 | void *data_ptr; | |
0185dda6 | 142 | size_t old_size; |
d0015fdd AQ |
143 | int ret = -ENOMEM; |
144 | ||
145 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
146 | ||
d0015fdd | 147 | old_size = (max_if_num - 1) * sizeof(unsigned long) * BATADV_NUM_WORDS; |
0185dda6 AQ |
148 | data_ptr = kmalloc_array(max_if_num, |
149 | BATADV_NUM_WORDS * sizeof(unsigned long), | |
150 | GFP_ATOMIC); | |
d0015fdd AQ |
151 | if (!data_ptr) |
152 | goto unlock; | |
153 | ||
154 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, old_size); | |
155 | kfree(orig_node->bat_iv.bcast_own); | |
156 | orig_node->bat_iv.bcast_own = data_ptr; | |
157 | ||
6b5e971a | 158 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
d0015fdd AQ |
159 | if (!data_ptr) { |
160 | kfree(orig_node->bat_iv.bcast_own); | |
161 | goto unlock; | |
162 | } | |
163 | ||
164 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 165 | (max_if_num - 1) * sizeof(u8)); |
d0015fdd AQ |
166 | kfree(orig_node->bat_iv.bcast_own_sum); |
167 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
168 | ||
169 | ret = 0; | |
170 | ||
171 | unlock: | |
172 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
173 | ||
174 | return ret; | |
175 | } | |
176 | ||
177 | /** | |
178 | * batadv_iv_ogm_orig_del_if - change the private structures of the orig_node to | |
179 | * exclude the removed interface | |
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 | |
183 | * | |
62fe710f | 184 | * Return: 0 on success, a negative error code otherwise. |
d0015fdd AQ |
185 | */ |
186 | static int batadv_iv_ogm_orig_del_if(struct batadv_orig_node *orig_node, | |
187 | int max_if_num, int del_if_num) | |
188 | { | |
13bbdd37 SE |
189 | int ret = -ENOMEM; |
190 | size_t chunk_size, if_offset; | |
d0015fdd AQ |
191 | void *data_ptr = NULL; |
192 | ||
193 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
194 | ||
195 | /* last interface was removed */ | |
196 | if (max_if_num == 0) | |
197 | goto free_bcast_own; | |
198 | ||
199 | chunk_size = sizeof(unsigned long) * BATADV_NUM_WORDS; | |
0185dda6 | 200 | data_ptr = kmalloc_array(max_if_num, chunk_size, GFP_ATOMIC); |
d0015fdd AQ |
201 | if (!data_ptr) |
202 | goto unlock; | |
203 | ||
204 | /* copy first part */ | |
205 | memcpy(data_ptr, orig_node->bat_iv.bcast_own, del_if_num * chunk_size); | |
206 | ||
207 | /* copy second part */ | |
13bbdd37 | 208 | if_offset = (del_if_num + 1) * chunk_size; |
d0015fdd | 209 | memcpy((char *)data_ptr + del_if_num * chunk_size, |
13bbdd37 | 210 | (uint8_t *)orig_node->bat_iv.bcast_own + if_offset, |
d0015fdd AQ |
211 | (max_if_num - del_if_num) * chunk_size); |
212 | ||
213 | free_bcast_own: | |
214 | kfree(orig_node->bat_iv.bcast_own); | |
215 | orig_node->bat_iv.bcast_own = data_ptr; | |
216 | ||
217 | if (max_if_num == 0) | |
218 | goto free_own_sum; | |
219 | ||
6b5e971a | 220 | data_ptr = kmalloc_array(max_if_num, sizeof(u8), GFP_ATOMIC); |
d0015fdd AQ |
221 | if (!data_ptr) { |
222 | kfree(orig_node->bat_iv.bcast_own); | |
223 | goto unlock; | |
224 | } | |
225 | ||
226 | memcpy(data_ptr, orig_node->bat_iv.bcast_own_sum, | |
6b5e971a | 227 | del_if_num * sizeof(u8)); |
d0015fdd | 228 | |
6b5e971a SE |
229 | if_offset = (del_if_num + 1) * sizeof(u8); |
230 | memcpy((char *)data_ptr + del_if_num * sizeof(u8), | |
d0015fdd | 231 | orig_node->bat_iv.bcast_own_sum + if_offset, |
6b5e971a | 232 | (max_if_num - del_if_num) * sizeof(u8)); |
d0015fdd AQ |
233 | |
234 | free_own_sum: | |
235 | kfree(orig_node->bat_iv.bcast_own_sum); | |
236 | orig_node->bat_iv.bcast_own_sum = data_ptr; | |
237 | ||
238 | ret = 0; | |
239 | unlock: | |
240 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); | |
241 | ||
242 | return ret; | |
243 | } | |
244 | ||
bbad0a5e AQ |
245 | /** |
246 | * batadv_iv_ogm_orig_get - retrieve or create (if does not exist) an originator | |
247 | * @bat_priv: the bat priv with all the soft interface information | |
248 | * @addr: mac address of the originator | |
249 | * | |
62fe710f | 250 | * Return: the originator object corresponding to the passed mac address or NULL |
bbad0a5e AQ |
251 | * on failure. |
252 | * If the object does not exists it is created an initialised. | |
253 | */ | |
254 | static struct batadv_orig_node * | |
6b5e971a | 255 | batadv_iv_ogm_orig_get(struct batadv_priv *bat_priv, const u8 *addr) |
bbad0a5e AQ |
256 | { |
257 | struct batadv_orig_node *orig_node; | |
258 | int size, hash_added; | |
259 | ||
260 | orig_node = batadv_orig_hash_find(bat_priv, addr); | |
261 | if (orig_node) | |
262 | return orig_node; | |
263 | ||
264 | orig_node = batadv_orig_node_new(bat_priv, addr); | |
265 | if (!orig_node) | |
266 | return NULL; | |
267 | ||
268 | spin_lock_init(&orig_node->bat_iv.ogm_cnt_lock); | |
269 | ||
270 | size = bat_priv->num_ifaces * sizeof(unsigned long) * BATADV_NUM_WORDS; | |
271 | orig_node->bat_iv.bcast_own = kzalloc(size, GFP_ATOMIC); | |
272 | if (!orig_node->bat_iv.bcast_own) | |
273 | goto free_orig_node; | |
274 | ||
6b5e971a | 275 | size = bat_priv->num_ifaces * sizeof(u8); |
bbad0a5e AQ |
276 | orig_node->bat_iv.bcast_own_sum = kzalloc(size, GFP_ATOMIC); |
277 | if (!orig_node->bat_iv.bcast_own_sum) | |
a5a5cb8c | 278 | goto free_orig_node; |
bbad0a5e AQ |
279 | |
280 | hash_added = batadv_hash_add(bat_priv->orig_hash, batadv_compare_orig, | |
281 | batadv_choose_orig, orig_node, | |
282 | &orig_node->hash_entry); | |
283 | if (hash_added != 0) | |
a5a5cb8c | 284 | goto free_orig_node; |
bbad0a5e AQ |
285 | |
286 | return orig_node; | |
287 | ||
bbad0a5e | 288 | free_orig_node: |
b2262df7 | 289 | /* free twice, as batadv_orig_node_new sets refcount to 2 */ |
5d967310 SE |
290 | batadv_orig_node_put(orig_node); |
291 | batadv_orig_node_put(orig_node); | |
bbad0a5e AQ |
292 | |
293 | return NULL; | |
294 | } | |
295 | ||
56303d34 SE |
296 | static struct batadv_neigh_node * |
297 | batadv_iv_ogm_neigh_new(struct batadv_hard_iface *hard_iface, | |
6b5e971a | 298 | const u8 *neigh_addr, |
56303d34 | 299 | struct batadv_orig_node *orig_node, |
863dd7a8 | 300 | struct batadv_orig_node *orig_neigh) |
7ae8b285 | 301 | { |
741aa06b | 302 | struct batadv_neigh_node *neigh_node; |
7ae8b285 | 303 | |
3f32f8a6 | 304 | neigh_node = batadv_neigh_node_new(orig_node, hard_iface, neigh_addr); |
7ae8b285 ML |
305 | if (!neigh_node) |
306 | goto out; | |
307 | ||
89652331 | 308 | neigh_node->orig_node = orig_neigh; |
7ae8b285 | 309 | |
7ae8b285 ML |
310 | out: |
311 | return neigh_node; | |
312 | } | |
313 | ||
56303d34 | 314 | static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 315 | { |
96412690 | 316 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 317 | unsigned char *ogm_buff; |
6b5e971a | 318 | u32 random_seqno; |
d7d32ec0 ML |
319 | |
320 | /* randomize initial seqno to avoid collision */ | |
321 | get_random_bytes(&random_seqno, sizeof(random_seqno)); | |
14511519 | 322 | atomic_set(&hard_iface->bat_iv.ogm_seqno, random_seqno); |
d0b9fd89 | 323 | |
14511519 ML |
324 | hard_iface->bat_iv.ogm_buff_len = BATADV_OGM_HLEN; |
325 | ogm_buff = kmalloc(hard_iface->bat_iv.ogm_buff_len, GFP_ATOMIC); | |
326 | if (!ogm_buff) | |
42d9f2cb | 327 | return -ENOMEM; |
77af7575 | 328 | |
14511519 ML |
329 | hard_iface->bat_iv.ogm_buff = ogm_buff; |
330 | ||
331 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; | |
a40d9b07 SW |
332 | batadv_ogm_packet->packet_type = BATADV_IV_OGM; |
333 | batadv_ogm_packet->version = BATADV_COMPAT_VERSION; | |
334 | batadv_ogm_packet->ttl = 2; | |
96412690 | 335 | batadv_ogm_packet->flags = BATADV_NO_FLAGS; |
414254e3 | 336 | batadv_ogm_packet->reserved = 0; |
96412690 | 337 | batadv_ogm_packet->tq = BATADV_TQ_MAX_VALUE; |
77af7575 | 338 | |
42d9f2cb | 339 | return 0; |
d0b9fd89 ML |
340 | } |
341 | ||
56303d34 | 342 | static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface *hard_iface) |
00a50076 | 343 | { |
14511519 ML |
344 | kfree(hard_iface->bat_iv.ogm_buff); |
345 | hard_iface->bat_iv.ogm_buff = NULL; | |
00a50076 ML |
346 | } |
347 | ||
56303d34 | 348 | static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface *hard_iface) |
d0b9fd89 | 349 | { |
96412690 | 350 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 351 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 352 | |
14511519 | 353 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
8fdd0153 AQ |
354 | ether_addr_copy(batadv_ogm_packet->orig, |
355 | hard_iface->net_dev->dev_addr); | |
356 | ether_addr_copy(batadv_ogm_packet->prev_sender, | |
357 | hard_iface->net_dev->dev_addr); | |
d0b9fd89 ML |
358 | } |
359 | ||
56303d34 SE |
360 | static void |
361 | batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface *hard_iface) | |
d0b9fd89 | 362 | { |
96412690 | 363 | struct batadv_ogm_packet *batadv_ogm_packet; |
14511519 | 364 | unsigned char *ogm_buff = hard_iface->bat_iv.ogm_buff; |
d0b9fd89 | 365 | |
14511519 | 366 | batadv_ogm_packet = (struct batadv_ogm_packet *)ogm_buff; |
a40d9b07 | 367 | batadv_ogm_packet->ttl = BATADV_TTL; |
d0b9fd89 ML |
368 | } |
369 | ||
b9dacc52 | 370 | /* when do we schedule our own ogm to be sent */ |
fe8bc396 | 371 | static unsigned long |
56303d34 | 372 | batadv_iv_ogm_emit_send_time(const struct batadv_priv *bat_priv) |
b9dacc52 | 373 | { |
42d0b044 SE |
374 | unsigned int msecs; |
375 | ||
376 | msecs = atomic_read(&bat_priv->orig_interval) - BATADV_JITTER; | |
e76e4320 | 377 | msecs += prandom_u32() % (2 * BATADV_JITTER); |
42d0b044 SE |
378 | |
379 | return jiffies + msecs_to_jiffies(msecs); | |
b9dacc52 ML |
380 | } |
381 | ||
382 | /* when do we schedule a ogm packet to be sent */ | |
fe8bc396 | 383 | static unsigned long batadv_iv_ogm_fwd_send_time(void) |
b9dacc52 | 384 | { |
e76e4320 | 385 | return jiffies + msecs_to_jiffies(prandom_u32() % (BATADV_JITTER / 2)); |
b9dacc52 ML |
386 | } |
387 | ||
388 | /* apply hop penalty for a normal link */ | |
6b5e971a | 389 | static u8 batadv_hop_penalty(u8 tq, const struct batadv_priv *bat_priv) |
b9dacc52 ML |
390 | { |
391 | int hop_penalty = atomic_read(&bat_priv->hop_penalty); | |
42d0b044 SE |
392 | int new_tq; |
393 | ||
394 | new_tq = tq * (BATADV_TQ_MAX_VALUE - hop_penalty); | |
395 | new_tq /= BATADV_TQ_MAX_VALUE; | |
396 | ||
397 | return new_tq; | |
b9dacc52 ML |
398 | } |
399 | ||
600184b7 SW |
400 | /** |
401 | * batadv_iv_ogm_aggr_packet - checks if there is another OGM attached | |
402 | * @buff_pos: current position in the skb | |
403 | * @packet_len: total length of the skb | |
404 | * @tvlv_len: tvlv length of the previously considered OGM | |
405 | * | |
406 | * Return: true if there is enough space for another OGM, false otherwise. | |
407 | */ | |
9fd9b19e MP |
408 | static bool batadv_iv_ogm_aggr_packet(int buff_pos, int packet_len, |
409 | __be16 tvlv_len) | |
fc957275 | 410 | { |
08c36d3e SE |
411 | int next_buff_pos = 0; |
412 | ||
7e071c79 | 413 | next_buff_pos += buff_pos + BATADV_OGM_HLEN; |
ef261577 | 414 | next_buff_pos += ntohs(tvlv_len); |
fc957275 ML |
415 | |
416 | return (next_buff_pos <= packet_len) && | |
42d0b044 | 417 | (next_buff_pos <= BATADV_MAX_AGGREGATION_BYTES); |
fc957275 ML |
418 | } |
419 | ||
b9dacc52 | 420 | /* send a batman ogm to a given interface */ |
56303d34 SE |
421 | static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet *forw_packet, |
422 | struct batadv_hard_iface *hard_iface) | |
b9dacc52 | 423 | { |
56303d34 | 424 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
de12baec | 425 | const char *fwd_str; |
6b5e971a SE |
426 | u8 packet_num; |
427 | s16 buff_pos; | |
96412690 | 428 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 429 | struct sk_buff *skb; |
6b5e971a | 430 | u8 *packet_pos; |
b9dacc52 | 431 | |
e9a4f295 | 432 | if (hard_iface->if_status != BATADV_IF_ACTIVE) |
b9dacc52 ML |
433 | return; |
434 | ||
435 | packet_num = 0; | |
436 | buff_pos = 0; | |
c67893d1 SE |
437 | packet_pos = forw_packet->skb->data; |
438 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
439 | |
440 | /* adjust all flags and log packets */ | |
fe8bc396 | 441 | while (batadv_iv_ogm_aggr_packet(buff_pos, forw_packet->packet_len, |
ef261577 | 442 | batadv_ogm_packet->tvlv_len)) { |
b9dacc52 | 443 | /* we might have aggregated direct link packets with an |
9cfc7bd6 SE |
444 | * ordinary base packet |
445 | */ | |
8de47de5 SE |
446 | if (forw_packet->direct_link_flags & BIT(packet_num) && |
447 | forw_packet->if_incoming == hard_iface) | |
96412690 | 448 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 449 | else |
96412690 | 450 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 451 | |
c67893d1 SE |
452 | if (packet_num > 0 || !forw_packet->own) |
453 | fwd_str = "Forwarding"; | |
454 | else | |
455 | fwd_str = "Sending own"; | |
456 | ||
39c75a51 | 457 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
e1bf0c14 | 458 | "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s) on interface %s [%pM]\n", |
1eda58bf | 459 | fwd_str, (packet_num > 0 ? "aggregated " : ""), |
96412690 SE |
460 | batadv_ogm_packet->orig, |
461 | ntohl(batadv_ogm_packet->seqno), | |
a40d9b07 | 462 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl, |
a2f2b6cd | 463 | ((batadv_ogm_packet->flags & BATADV_DIRECTLINK) ? |
1eda58bf | 464 | "on" : "off"), |
e1bf0c14 | 465 | hard_iface->net_dev->name, |
1eda58bf | 466 | hard_iface->net_dev->dev_addr); |
b9dacc52 | 467 | |
7e071c79 | 468 | buff_pos += BATADV_OGM_HLEN; |
ef261577 | 469 | buff_pos += ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 470 | packet_num++; |
c67893d1 SE |
471 | packet_pos = forw_packet->skb->data + buff_pos; |
472 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b9dacc52 ML |
473 | } |
474 | ||
475 | /* create clone because function is called more than once */ | |
476 | skb = skb_clone(forw_packet->skb, GFP_ATOMIC); | |
f8214865 | 477 | if (skb) { |
d69909d2 SE |
478 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_TX); |
479 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_TX_BYTES, | |
f8214865 | 480 | skb->len + ETH_HLEN); |
95d39278 | 481 | batadv_send_broadcast_skb(skb, hard_iface); |
f8214865 | 482 | } |
b9dacc52 ML |
483 | } |
484 | ||
485 | /* send a batman ogm packet */ | |
56303d34 | 486 | static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) |
b9dacc52 | 487 | { |
b9dacc52 | 488 | struct net_device *soft_iface; |
56303d34 SE |
489 | struct batadv_priv *bat_priv; |
490 | struct batadv_hard_iface *primary_if = NULL; | |
b9dacc52 ML |
491 | |
492 | if (!forw_packet->if_incoming) { | |
86ceb360 | 493 | pr_err("Error - can't forward packet: incoming iface not specified\n"); |
b9dacc52 ML |
494 | goto out; |
495 | } | |
496 | ||
497 | soft_iface = forw_packet->if_incoming->soft_iface; | |
498 | bat_priv = netdev_priv(soft_iface); | |
499 | ||
ef0a937f | 500 | if (WARN_ON(!forw_packet->if_outgoing)) |
b9dacc52 ML |
501 | goto out; |
502 | ||
ef0a937f | 503 | if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) |
b9dacc52 ML |
504 | goto out; |
505 | ||
ef0a937f | 506 | if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) |
b9dacc52 | 507 | goto out; |
b9dacc52 | 508 | |
ef0a937f SW |
509 | primary_if = batadv_primary_if_get_selected(bat_priv); |
510 | if (!primary_if) | |
511 | goto out; | |
b9dacc52 | 512 | |
ef0a937f SW |
513 | /* only for one specific outgoing interface */ |
514 | batadv_iv_ogm_send_to_if(forw_packet, forw_packet->if_outgoing); | |
b9dacc52 ML |
515 | |
516 | out: | |
517 | if (primary_if) | |
82047ad7 | 518 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
519 | } |
520 | ||
ef0a937f SW |
521 | /** |
522 | * batadv_iv_ogm_can_aggregate - find out if an OGM can be aggregated on an | |
523 | * existing forward packet | |
524 | * @new_bat_ogm_packet: OGM packet to be aggregated | |
525 | * @bat_priv: the bat priv with all the soft interface information | |
526 | * @packet_len: (total) length of the OGM | |
527 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
95298a91 | 528 | * @directlink: true if this is a direct link packet |
ef0a937f SW |
529 | * @if_incoming: interface where the packet was received |
530 | * @if_outgoing: interface for which the retransmission should be considered | |
531 | * @forw_packet: the forwarded packet which should be checked | |
532 | * | |
62fe710f | 533 | * Return: true if new_packet can be aggregated with forw_packet |
ef0a937f | 534 | */ |
fe8bc396 | 535 | static bool |
96412690 | 536 | batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet *new_bat_ogm_packet, |
56303d34 | 537 | struct batadv_priv *bat_priv, |
fe8bc396 SE |
538 | int packet_len, unsigned long send_time, |
539 | bool directlink, | |
56303d34 | 540 | const struct batadv_hard_iface *if_incoming, |
ef0a937f | 541 | const struct batadv_hard_iface *if_outgoing, |
56303d34 | 542 | const struct batadv_forw_packet *forw_packet) |
b9dacc52 | 543 | { |
96412690 | 544 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 545 | int aggregated_bytes = forw_packet->packet_len + packet_len; |
56303d34 | 546 | struct batadv_hard_iface *primary_if = NULL; |
b9dacc52 | 547 | bool res = false; |
42d0b044 | 548 | unsigned long aggregation_end_time; |
b9dacc52 | 549 | |
96412690 | 550 | batadv_ogm_packet = (struct batadv_ogm_packet *)forw_packet->skb->data; |
42d0b044 SE |
551 | aggregation_end_time = send_time; |
552 | aggregation_end_time += msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); | |
b9dacc52 | 553 | |
9cfc7bd6 | 554 | /* we can aggregate the current packet to this aggregated packet |
b9dacc52 ML |
555 | * if: |
556 | * | |
557 | * - the send time is within our MAX_AGGREGATION_MS time | |
558 | * - the resulting packet wont be bigger than | |
559 | * MAX_AGGREGATION_BYTES | |
8f34b388 | 560 | * otherwise aggregation is not possible |
b9dacc52 | 561 | */ |
8f34b388 MP |
562 | if (!time_before(send_time, forw_packet->send_time) || |
563 | !time_after_eq(aggregation_end_time, forw_packet->send_time)) | |
564 | return false; | |
565 | ||
566 | if (aggregated_bytes > BATADV_MAX_AGGREGATION_BYTES) | |
567 | return false; | |
568 | ||
569 | /* packet is not leaving on the same interface. */ | |
570 | if (forw_packet->if_outgoing != if_outgoing) | |
571 | return false; | |
572 | ||
573 | /* check aggregation compatibility | |
574 | * -> direct link packets are broadcasted on | |
575 | * their interface only | |
576 | * -> aggregate packet if the current packet is | |
577 | * a "global" packet as well as the base | |
578 | * packet | |
579 | */ | |
580 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
581 | if (!primary_if) | |
582 | return false; | |
ef0a937f | 583 | |
8f34b388 MP |
584 | /* packets without direct link flag and high TTL |
585 | * are flooded through the net | |
586 | */ | |
587 | if (!directlink && | |
588 | !(batadv_ogm_packet->flags & BATADV_DIRECTLINK) && | |
589 | batadv_ogm_packet->ttl != 1 && | |
590 | ||
591 | /* own packets originating non-primary | |
592 | * interfaces leave only that interface | |
593 | */ | |
594 | (!forw_packet->own || | |
595 | forw_packet->if_incoming == primary_if)) { | |
596 | res = true; | |
597 | goto out; | |
598 | } | |
b9dacc52 | 599 | |
8f34b388 MP |
600 | /* if the incoming packet is sent via this one |
601 | * interface only - we still can aggregate | |
602 | */ | |
603 | if (directlink && | |
604 | new_bat_ogm_packet->ttl == 1 && | |
605 | forw_packet->if_incoming == if_incoming && | |
606 | ||
607 | /* packets from direct neighbors or | |
608 | * own secondary interface packets | |
609 | * (= secondary interface packets in general) | |
610 | */ | |
611 | (batadv_ogm_packet->flags & BATADV_DIRECTLINK || | |
612 | (forw_packet->own && | |
613 | forw_packet->if_incoming != primary_if))) { | |
614 | res = true; | |
615 | goto out; | |
b9dacc52 ML |
616 | } |
617 | ||
618 | out: | |
619 | if (primary_if) | |
82047ad7 | 620 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
621 | return res; |
622 | } | |
623 | ||
1b371d13 SW |
624 | /** |
625 | * batadv_iv_ogm_aggregate_new - create a new aggregated packet and add this | |
ef0a937f SW |
626 | * packet to it. |
627 | * @packet_buff: pointer to the OGM | |
628 | * @packet_len: (total) length of the OGM | |
629 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
630 | * @direct_link: whether this OGM has direct link status | |
631 | * @if_incoming: interface where the packet was received | |
632 | * @if_outgoing: interface for which the retransmission should be considered | |
633 | * @own_packet: true if it is a self-generated ogm | |
634 | */ | |
fe8bc396 SE |
635 | static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff, |
636 | int packet_len, unsigned long send_time, | |
637 | bool direct_link, | |
56303d34 | 638 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 639 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 640 | int own_packet) |
b9dacc52 | 641 | { |
56303d34 SE |
642 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
643 | struct batadv_forw_packet *forw_packet_aggr; | |
b9dacc52 | 644 | unsigned char *skb_buff; |
42d0b044 | 645 | unsigned int skb_size; |
b9dacc52 | 646 | |
7a659d56 | 647 | if (!kref_get_unless_zero(&if_incoming->refcount)) |
b9dacc52 ML |
648 | return; |
649 | ||
7a659d56 | 650 | if (!kref_get_unless_zero(&if_outgoing->refcount)) |
ef0a937f SW |
651 | goto out_free_incoming; |
652 | ||
b9dacc52 ML |
653 | /* own packet should always be scheduled */ |
654 | if (!own_packet) { | |
3e34819e | 655 | if (!batadv_atomic_dec_not_zero(&bat_priv->batman_queue_left)) { |
39c75a51 | 656 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 657 | "batman packet queue full\n"); |
940d156f | 658 | goto out_free_outgoing; |
b9dacc52 ML |
659 | } |
660 | } | |
661 | ||
662 | forw_packet_aggr = kmalloc(sizeof(*forw_packet_aggr), GFP_ATOMIC); | |
940d156f MP |
663 | if (!forw_packet_aggr) |
664 | goto out_nomem; | |
b9dacc52 | 665 | |
940d156f MP |
666 | if (atomic_read(&bat_priv->aggregated_ogms) && |
667 | packet_len < BATADV_MAX_AGGREGATION_BYTES) | |
5b246574 | 668 | skb_size = BATADV_MAX_AGGREGATION_BYTES; |
b9dacc52 | 669 | else |
5b246574 SE |
670 | skb_size = packet_len; |
671 | ||
41ab6c48 | 672 | skb_size += ETH_HLEN; |
b9dacc52 | 673 | |
41ab6c48 | 674 | forw_packet_aggr->skb = netdev_alloc_skb_ip_align(NULL, skb_size); |
940d156f MP |
675 | if (!forw_packet_aggr->skb) |
676 | goto out_free_forw_packet; | |
c54f38c9 | 677 | forw_packet_aggr->skb->priority = TC_PRIO_CONTROL; |
41ab6c48 | 678 | skb_reserve(forw_packet_aggr->skb, ETH_HLEN); |
b9dacc52 | 679 | |
b9dacc52 ML |
680 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); |
681 | forw_packet_aggr->packet_len = packet_len; | |
682 | memcpy(skb_buff, packet_buff, packet_len); | |
683 | ||
684 | forw_packet_aggr->own = own_packet; | |
685 | forw_packet_aggr->if_incoming = if_incoming; | |
ef0a937f | 686 | forw_packet_aggr->if_outgoing = if_outgoing; |
b9dacc52 | 687 | forw_packet_aggr->num_packets = 0; |
42d0b044 | 688 | forw_packet_aggr->direct_link_flags = BATADV_NO_FLAGS; |
b9dacc52 ML |
689 | forw_packet_aggr->send_time = send_time; |
690 | ||
691 | /* save packet direct link flag status */ | |
692 | if (direct_link) | |
693 | forw_packet_aggr->direct_link_flags |= 1; | |
694 | ||
695 | /* add new packet to packet list */ | |
696 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
697 | hlist_add_head(&forw_packet_aggr->list, &bat_priv->forw_bat_list); | |
698 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
699 | ||
700 | /* start timer for this packet */ | |
701 | INIT_DELAYED_WORK(&forw_packet_aggr->delayed_work, | |
9455e34c | 702 | batadv_send_outstanding_bat_ogm_packet); |
3193e8fd | 703 | queue_delayed_work(batadv_event_workqueue, |
b9dacc52 ML |
704 | &forw_packet_aggr->delayed_work, |
705 | send_time - jiffies); | |
706 | ||
707 | return; | |
940d156f MP |
708 | out_free_forw_packet: |
709 | kfree(forw_packet_aggr); | |
710 | out_nomem: | |
711 | if (!own_packet) | |
712 | atomic_inc(&bat_priv->batman_queue_left); | |
713 | out_free_outgoing: | |
82047ad7 | 714 | batadv_hardif_put(if_outgoing); |
ef0a937f | 715 | out_free_incoming: |
82047ad7 | 716 | batadv_hardif_put(if_incoming); |
b9dacc52 ML |
717 | } |
718 | ||
719 | /* aggregate a new packet into the existing ogm packet */ | |
56303d34 | 720 | static void batadv_iv_ogm_aggregate(struct batadv_forw_packet *forw_packet_aggr, |
fe8bc396 SE |
721 | const unsigned char *packet_buff, |
722 | int packet_len, bool direct_link) | |
b9dacc52 ML |
723 | { |
724 | unsigned char *skb_buff; | |
8de47de5 | 725 | unsigned long new_direct_link_flag; |
b9dacc52 ML |
726 | |
727 | skb_buff = skb_put(forw_packet_aggr->skb, packet_len); | |
728 | memcpy(skb_buff, packet_buff, packet_len); | |
729 | forw_packet_aggr->packet_len += packet_len; | |
730 | forw_packet_aggr->num_packets++; | |
731 | ||
732 | /* save packet direct link flag status */ | |
8de47de5 SE |
733 | if (direct_link) { |
734 | new_direct_link_flag = BIT(forw_packet_aggr->num_packets); | |
735 | forw_packet_aggr->direct_link_flags |= new_direct_link_flag; | |
736 | } | |
b9dacc52 ML |
737 | } |
738 | ||
ef0a937f SW |
739 | /** |
740 | * batadv_iv_ogm_queue_add - queue up an OGM for transmission | |
741 | * @bat_priv: the bat priv with all the soft interface information | |
742 | * @packet_buff: pointer to the OGM | |
743 | * @packet_len: (total) length of the OGM | |
744 | * @if_incoming: interface where the packet was received | |
745 | * @if_outgoing: interface for which the retransmission should be considered | |
746 | * @own_packet: true if it is a self-generated ogm | |
747 | * @send_time: timestamp (jiffies) when the packet is to be sent | |
748 | */ | |
56303d34 | 749 | static void batadv_iv_ogm_queue_add(struct batadv_priv *bat_priv, |
fe8bc396 SE |
750 | unsigned char *packet_buff, |
751 | int packet_len, | |
56303d34 | 752 | struct batadv_hard_iface *if_incoming, |
ef0a937f | 753 | struct batadv_hard_iface *if_outgoing, |
fe8bc396 | 754 | int own_packet, unsigned long send_time) |
b9dacc52 | 755 | { |
9cfc7bd6 | 756 | /* _aggr -> pointer to the packet we want to aggregate with |
b9dacc52 ML |
757 | * _pos -> pointer to the position in the queue |
758 | */ | |
56303d34 SE |
759 | struct batadv_forw_packet *forw_packet_aggr = NULL; |
760 | struct batadv_forw_packet *forw_packet_pos = NULL; | |
96412690 | 761 | struct batadv_ogm_packet *batadv_ogm_packet; |
b9dacc52 | 762 | bool direct_link; |
42d0b044 | 763 | unsigned long max_aggregation_jiffies; |
b9dacc52 | 764 | |
96412690 | 765 | batadv_ogm_packet = (struct batadv_ogm_packet *)packet_buff; |
56489151 | 766 | direct_link = !!(batadv_ogm_packet->flags & BATADV_DIRECTLINK); |
42d0b044 | 767 | max_aggregation_jiffies = msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS); |
b9dacc52 ML |
768 | |
769 | /* find position for the packet in the forward queue */ | |
770 | spin_lock_bh(&bat_priv->forw_bat_list_lock); | |
771 | /* own packets are not to be aggregated */ | |
56489151 | 772 | if (atomic_read(&bat_priv->aggregated_ogms) && !own_packet) { |
b67bfe0d | 773 | hlist_for_each_entry(forw_packet_pos, |
b9dacc52 | 774 | &bat_priv->forw_bat_list, list) { |
96412690 | 775 | if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet, |
fe8bc396 SE |
776 | bat_priv, packet_len, |
777 | send_time, direct_link, | |
778 | if_incoming, | |
ef0a937f | 779 | if_outgoing, |
fe8bc396 | 780 | forw_packet_pos)) { |
b9dacc52 ML |
781 | forw_packet_aggr = forw_packet_pos; |
782 | break; | |
783 | } | |
784 | } | |
785 | } | |
786 | ||
787 | /* nothing to aggregate with - either aggregation disabled or no | |
9cfc7bd6 SE |
788 | * suitable aggregation packet found |
789 | */ | |
b9dacc52 ML |
790 | if (!forw_packet_aggr) { |
791 | /* the following section can run without the lock */ | |
792 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); | |
793 | ||
9cfc7bd6 | 794 | /* if we could not aggregate this packet with one of the others |
b9dacc52 ML |
795 | * we hold it back for a while, so that it might be aggregated |
796 | * later on | |
797 | */ | |
42d0b044 SE |
798 | if (!own_packet && atomic_read(&bat_priv->aggregated_ogms)) |
799 | send_time += max_aggregation_jiffies; | |
b9dacc52 | 800 | |
fe8bc396 SE |
801 | batadv_iv_ogm_aggregate_new(packet_buff, packet_len, |
802 | send_time, direct_link, | |
ef0a937f SW |
803 | if_incoming, if_outgoing, |
804 | own_packet); | |
b9dacc52 | 805 | } else { |
fe8bc396 SE |
806 | batadv_iv_ogm_aggregate(forw_packet_aggr, packet_buff, |
807 | packet_len, direct_link); | |
b9dacc52 ML |
808 | spin_unlock_bh(&bat_priv->forw_bat_list_lock); |
809 | } | |
810 | } | |
811 | ||
56303d34 | 812 | static void batadv_iv_ogm_forward(struct batadv_orig_node *orig_node, |
fe8bc396 | 813 | const struct ethhdr *ethhdr, |
96412690 | 814 | struct batadv_ogm_packet *batadv_ogm_packet, |
fe8bc396 SE |
815 | bool is_single_hop_neigh, |
816 | bool is_from_best_next_hop, | |
ef0a937f SW |
817 | struct batadv_hard_iface *if_incoming, |
818 | struct batadv_hard_iface *if_outgoing) | |
b9dacc52 | 819 | { |
56303d34 | 820 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
6b5e971a | 821 | u16 tvlv_len; |
b9dacc52 | 822 | |
a40d9b07 | 823 | if (batadv_ogm_packet->ttl <= 1) { |
39c75a51 | 824 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, "ttl exceeded\n"); |
b9dacc52 ML |
825 | return; |
826 | } | |
827 | ||
13b2541b ML |
828 | if (!is_from_best_next_hop) { |
829 | /* Mark the forwarded packet when it is not coming from our | |
830 | * best next hop. We still need to forward the packet for our | |
831 | * neighbor link quality detection to work in case the packet | |
832 | * originated from a single hop neighbor. Otherwise we can | |
833 | * simply drop the ogm. | |
834 | */ | |
835 | if (is_single_hop_neigh) | |
96412690 | 836 | batadv_ogm_packet->flags |= BATADV_NOT_BEST_NEXT_HOP; |
13b2541b ML |
837 | else |
838 | return; | |
839 | } | |
b9dacc52 | 840 | |
ef261577 | 841 | tvlv_len = ntohs(batadv_ogm_packet->tvlv_len); |
b9dacc52 | 842 | |
a40d9b07 | 843 | batadv_ogm_packet->ttl--; |
8fdd0153 | 844 | ether_addr_copy(batadv_ogm_packet->prev_sender, ethhdr->h_source); |
b9dacc52 | 845 | |
b9dacc52 | 846 | /* apply hop penalty */ |
96412690 | 847 | batadv_ogm_packet->tq = batadv_hop_penalty(batadv_ogm_packet->tq, |
fe8bc396 | 848 | bat_priv); |
b9dacc52 | 849 | |
39c75a51 | 850 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 851 | "Forwarding packet: tq: %i, ttl: %i\n", |
a40d9b07 | 852 | batadv_ogm_packet->tq, batadv_ogm_packet->ttl); |
b9dacc52 | 853 | |
75cd33f8 | 854 | if (is_single_hop_neigh) |
96412690 | 855 | batadv_ogm_packet->flags |= BATADV_DIRECTLINK; |
b9dacc52 | 856 | else |
96412690 | 857 | batadv_ogm_packet->flags &= ~BATADV_DIRECTLINK; |
b9dacc52 | 858 | |
96412690 | 859 | batadv_iv_ogm_queue_add(bat_priv, (unsigned char *)batadv_ogm_packet, |
ef261577 | 860 | BATADV_OGM_HLEN + tvlv_len, |
ef0a937f SW |
861 | if_incoming, if_outgoing, 0, |
862 | batadv_iv_ogm_fwd_send_time()); | |
b9dacc52 ML |
863 | } |
864 | ||
d9896617 AQ |
865 | /** |
866 | * batadv_iv_ogm_slide_own_bcast_window - bitshift own OGM broadcast windows for | |
867 | * the given interface | |
868 | * @hard_iface: the interface for which the windows have to be shifted | |
869 | */ | |
870 | static void | |
871 | batadv_iv_ogm_slide_own_bcast_window(struct batadv_hard_iface *hard_iface) | |
872 | { | |
873 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); | |
874 | struct batadv_hashtable *hash = bat_priv->orig_hash; | |
875 | struct hlist_head *head; | |
876 | struct batadv_orig_node *orig_node; | |
877 | unsigned long *word; | |
6b5e971a | 878 | u32 i; |
d9896617 | 879 | size_t word_index; |
6b5e971a | 880 | u8 *w; |
bbad0a5e | 881 | int if_num; |
d9896617 AQ |
882 | |
883 | for (i = 0; i < hash->size; i++) { | |
884 | head = &hash->table[i]; | |
885 | ||
886 | rcu_read_lock(); | |
887 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
bbad0a5e | 888 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 | 889 | word_index = hard_iface->if_num * BATADV_NUM_WORDS; |
32db6aaa | 890 | word = &orig_node->bat_iv.bcast_own[word_index]; |
d9896617 AQ |
891 | |
892 | batadv_bit_get_packet(bat_priv, word, 1, 0); | |
bbad0a5e AQ |
893 | if_num = hard_iface->if_num; |
894 | w = &orig_node->bat_iv.bcast_own_sum[if_num]; | |
d9896617 | 895 | *w = bitmap_weight(word, BATADV_TQ_LOCAL_WINDOW_SIZE); |
bbad0a5e | 896 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
d9896617 AQ |
897 | } |
898 | rcu_read_unlock(); | |
899 | } | |
900 | } | |
901 | ||
56303d34 | 902 | static void batadv_iv_ogm_schedule(struct batadv_hard_iface *hard_iface) |
b9dacc52 | 903 | { |
56303d34 | 904 | struct batadv_priv *bat_priv = netdev_priv(hard_iface->soft_iface); |
14511519 | 905 | unsigned char **ogm_buff = &hard_iface->bat_iv.ogm_buff; |
96412690 | 906 | struct batadv_ogm_packet *batadv_ogm_packet; |
ef0a937f | 907 | struct batadv_hard_iface *primary_if, *tmp_hard_iface; |
14511519 | 908 | int *ogm_buff_len = &hard_iface->bat_iv.ogm_buff_len; |
6b5e971a SE |
909 | u32 seqno; |
910 | u16 tvlv_len = 0; | |
ef0a937f | 911 | unsigned long send_time; |
b9dacc52 | 912 | |
e5d89254 | 913 | primary_if = batadv_primary_if_get_selected(bat_priv); |
b9dacc52 | 914 | |
e1bf0c14 ML |
915 | if (hard_iface == primary_if) { |
916 | /* tt changes have to be committed before the tvlv data is | |
917 | * appended as it may alter the tt tvlv container | |
918 | */ | |
919 | batadv_tt_local_commit_changes(bat_priv); | |
ef261577 ML |
920 | tvlv_len = batadv_tvlv_container_ogm_append(bat_priv, ogm_buff, |
921 | ogm_buff_len, | |
922 | BATADV_OGM_HLEN); | |
e1bf0c14 | 923 | } |
be9aa4c1 | 924 | |
14511519 | 925 | batadv_ogm_packet = (struct batadv_ogm_packet *)(*ogm_buff); |
ef261577 | 926 | batadv_ogm_packet->tvlv_len = htons(tvlv_len); |
b9dacc52 ML |
927 | |
928 | /* change sequence number to network order */ | |
6b5e971a | 929 | seqno = (u32)atomic_read(&hard_iface->bat_iv.ogm_seqno); |
bbb1f90e | 930 | batadv_ogm_packet->seqno = htonl(seqno); |
14511519 | 931 | atomic_inc(&hard_iface->bat_iv.ogm_seqno); |
b9dacc52 | 932 | |
d9896617 | 933 | batadv_iv_ogm_slide_own_bcast_window(hard_iface); |
b9dacc52 | 934 | |
ef0a937f SW |
935 | send_time = batadv_iv_ogm_emit_send_time(bat_priv); |
936 | ||
937 | if (hard_iface != primary_if) { | |
938 | /* OGMs from secondary interfaces are only scheduled on their | |
939 | * respective interfaces. | |
940 | */ | |
941 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, *ogm_buff_len, | |
942 | hard_iface, hard_iface, 1, send_time); | |
943 | goto out; | |
944 | } | |
945 | ||
946 | /* OGMs from primary interfaces are scheduled on all | |
947 | * interfaces. | |
948 | */ | |
949 | rcu_read_lock(); | |
950 | list_for_each_entry_rcu(tmp_hard_iface, &batadv_hardif_list, list) { | |
951 | if (tmp_hard_iface->soft_iface != hard_iface->soft_iface) | |
87b40f53 | 952 | continue; |
ef0a937f SW |
953 | batadv_iv_ogm_queue_add(bat_priv, *ogm_buff, |
954 | *ogm_buff_len, hard_iface, | |
955 | tmp_hard_iface, 1, send_time); | |
956 | } | |
957 | rcu_read_unlock(); | |
958 | ||
959 | out: | |
b9dacc52 | 960 | if (primary_if) |
82047ad7 | 961 | batadv_hardif_put(primary_if); |
b9dacc52 ML |
962 | } |
963 | ||
89652331 SW |
964 | /** |
965 | * batadv_iv_ogm_orig_update - use OGM to update corresponding data in an | |
966 | * originator | |
967 | * @bat_priv: the bat priv with all the soft interface information | |
968 | * @orig_node: the orig node who originally emitted the ogm packet | |
7351a482 | 969 | * @orig_ifinfo: ifinfo for the outgoing interface of the orig_node |
89652331 SW |
970 | * @ethhdr: Ethernet header of the OGM |
971 | * @batadv_ogm_packet: the ogm packet | |
972 | * @if_incoming: interface where the packet was received | |
973 | * @if_outgoing: interface for which the retransmission should be considered | |
89652331 SW |
974 | * @dup_status: the duplicate status of this ogm packet. |
975 | */ | |
fe8bc396 | 976 | static void |
56303d34 SE |
977 | batadv_iv_ogm_orig_update(struct batadv_priv *bat_priv, |
978 | struct batadv_orig_node *orig_node, | |
7351a482 | 979 | struct batadv_orig_ifinfo *orig_ifinfo, |
fe8bc396 | 980 | const struct ethhdr *ethhdr, |
96412690 | 981 | const struct batadv_ogm_packet *batadv_ogm_packet, |
56303d34 | 982 | struct batadv_hard_iface *if_incoming, |
89652331 | 983 | struct batadv_hard_iface *if_outgoing, |
7c24bbbe | 984 | enum batadv_dup_status dup_status) |
fc957275 | 985 | { |
89652331 SW |
986 | struct batadv_neigh_ifinfo *neigh_ifinfo = NULL; |
987 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; | |
4f248cff SE |
988 | struct batadv_neigh_node *neigh_node = NULL; |
989 | struct batadv_neigh_node *tmp_neigh_node = NULL; | |
56303d34 SE |
990 | struct batadv_neigh_node *router = NULL; |
991 | struct batadv_orig_node *orig_node_tmp; | |
7caf69fb | 992 | int if_num; |
6b5e971a SE |
993 | u8 sum_orig, sum_neigh; |
994 | u8 *neigh_addr; | |
995 | u8 tq_avg; | |
fc957275 | 996 | |
39c75a51 | 997 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 998 | "update_originator(): Searching and updating originator entry of received packet\n"); |
fc957275 ML |
999 | |
1000 | rcu_read_lock(); | |
b67bfe0d | 1001 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1002 | &orig_node->neigh_list, list) { |
1eda58bf SE |
1003 | neigh_addr = tmp_neigh_node->addr; |
1004 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && | |
1005 | tmp_neigh_node->if_incoming == if_incoming && | |
77ae32e8 | 1006 | kref_get_unless_zero(&tmp_neigh_node->refcount)) { |
38dc40ef | 1007 | if (WARN(neigh_node, "too many matching neigh_nodes")) |
25bb2509 | 1008 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1009 | neigh_node = tmp_neigh_node; |
1010 | continue; | |
1011 | } | |
1012 | ||
7c24bbbe | 1013 | if (dup_status != BATADV_NO_DUP) |
fc957275 ML |
1014 | continue; |
1015 | ||
89652331 SW |
1016 | /* only update the entry for this outgoing interface */ |
1017 | neigh_ifinfo = batadv_neigh_ifinfo_get(tmp_neigh_node, | |
1018 | if_outgoing); | |
1019 | if (!neigh_ifinfo) | |
1020 | continue; | |
1021 | ||
1022 | spin_lock_bh(&tmp_neigh_node->ifinfo_lock); | |
1023 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1024 | &neigh_ifinfo->bat_iv.tq_index, 0); | |
1025 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); | |
1026 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1027 | spin_unlock_bh(&tmp_neigh_node->ifinfo_lock); | |
1028 | ||
044fa3ae | 1029 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1030 | neigh_ifinfo = NULL; |
fc957275 ML |
1031 | } |
1032 | ||
1033 | if (!neigh_node) { | |
56303d34 | 1034 | struct batadv_orig_node *orig_tmp; |
fc957275 | 1035 | |
bbad0a5e | 1036 | orig_tmp = batadv_iv_ogm_orig_get(bat_priv, ethhdr->h_source); |
fc957275 ML |
1037 | if (!orig_tmp) |
1038 | goto unlock; | |
1039 | ||
fe8bc396 SE |
1040 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1041 | ethhdr->h_source, | |
863dd7a8 | 1042 | orig_node, orig_tmp); |
fc957275 | 1043 | |
5d967310 | 1044 | batadv_orig_node_put(orig_tmp); |
fc957275 ML |
1045 | if (!neigh_node) |
1046 | goto unlock; | |
23badd6d | 1047 | } else { |
39c75a51 | 1048 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1049 | "Updating existing last-hop neighbor of originator\n"); |
23badd6d | 1050 | } |
fc957275 ML |
1051 | |
1052 | rcu_read_unlock(); | |
89652331 SW |
1053 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1054 | if (!neigh_ifinfo) | |
1055 | goto out; | |
fc957275 | 1056 | |
d7b2a97e | 1057 | neigh_node->last_seen = jiffies; |
fc957275 | 1058 | |
89652331 SW |
1059 | spin_lock_bh(&neigh_node->ifinfo_lock); |
1060 | batadv_ring_buffer_set(neigh_ifinfo->bat_iv.tq_recv, | |
1061 | &neigh_ifinfo->bat_iv.tq_index, | |
96412690 | 1062 | batadv_ogm_packet->tq); |
89652331 SW |
1063 | tq_avg = batadv_ring_buffer_avg(neigh_ifinfo->bat_iv.tq_recv); |
1064 | neigh_ifinfo->bat_iv.tq_avg = tq_avg; | |
1065 | spin_unlock_bh(&neigh_node->ifinfo_lock); | |
fc957275 | 1066 | |
7c24bbbe | 1067 | if (dup_status == BATADV_NO_DUP) { |
7351a482 | 1068 | orig_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
89652331 | 1069 | neigh_ifinfo->last_ttl = batadv_ogm_packet->ttl; |
fc957275 ML |
1070 | } |
1071 | ||
fc957275 | 1072 | /* if this neighbor already is our next hop there is nothing |
9cfc7bd6 SE |
1073 | * to change |
1074 | */ | |
7351a482 | 1075 | router = batadv_orig_router_get(orig_node, if_outgoing); |
fc957275 | 1076 | if (router == neigh_node) |
e1bf0c14 | 1077 | goto out; |
fc957275 | 1078 | |
89652331 SW |
1079 | if (router) { |
1080 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
1081 | if (!router_ifinfo) | |
1082 | goto out; | |
1083 | ||
1084 | /* if this neighbor does not offer a better TQ we won't | |
1085 | * consider it | |
1086 | */ | |
1087 | if (router_ifinfo->bat_iv.tq_avg > neigh_ifinfo->bat_iv.tq_avg) | |
1088 | goto out; | |
1089 | } | |
fc957275 ML |
1090 | |
1091 | /* if the TQ is the same and the link not more symmetric we | |
9cfc7bd6 SE |
1092 | * won't consider it either |
1093 | */ | |
89652331 | 1094 | if (router_ifinfo && |
01b97a3e | 1095 | neigh_ifinfo->bat_iv.tq_avg == router_ifinfo->bat_iv.tq_avg) { |
fc957275 | 1096 | orig_node_tmp = router->orig_node; |
bbad0a5e | 1097 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1098 | if_num = router->if_incoming->if_num; |
bbad0a5e AQ |
1099 | sum_orig = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1100 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 ML |
1101 | |
1102 | orig_node_tmp = neigh_node->orig_node; | |
bbad0a5e | 1103 | spin_lock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); |
7caf69fb | 1104 | if_num = neigh_node->if_incoming->if_num; |
bbad0a5e AQ |
1105 | sum_neigh = orig_node_tmp->bat_iv.bcast_own_sum[if_num]; |
1106 | spin_unlock_bh(&orig_node_tmp->bat_iv.ogm_cnt_lock); | |
fc957275 | 1107 | |
bbb1f90e | 1108 | if (sum_orig >= sum_neigh) |
e1bf0c14 | 1109 | goto out; |
fc957275 ML |
1110 | } |
1111 | ||
7351a482 | 1112 | batadv_update_route(bat_priv, orig_node, if_outgoing, neigh_node); |
fc957275 ML |
1113 | goto out; |
1114 | ||
1115 | unlock: | |
1116 | rcu_read_unlock(); | |
1117 | out: | |
1118 | if (neigh_node) | |
25bb2509 | 1119 | batadv_neigh_node_put(neigh_node); |
fc957275 | 1120 | if (router) |
25bb2509 | 1121 | batadv_neigh_node_put(router); |
89652331 | 1122 | if (neigh_ifinfo) |
044fa3ae | 1123 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 | 1124 | if (router_ifinfo) |
044fa3ae | 1125 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 ML |
1126 | } |
1127 | ||
89652331 SW |
1128 | /** |
1129 | * batadv_iv_ogm_calc_tq - calculate tq for current received ogm packet | |
1130 | * @orig_node: the orig node who originally emitted the ogm packet | |
1131 | * @orig_neigh_node: the orig node struct of the neighbor who sent the packet | |
1132 | * @batadv_ogm_packet: the ogm packet | |
1133 | * @if_incoming: interface where the packet was received | |
1134 | * @if_outgoing: interface for which the retransmission should be considered | |
1135 | * | |
62fe710f | 1136 | * Return: 1 if the link can be considered bidirectional, 0 otherwise |
89652331 | 1137 | */ |
56303d34 SE |
1138 | static int batadv_iv_ogm_calc_tq(struct batadv_orig_node *orig_node, |
1139 | struct batadv_orig_node *orig_neigh_node, | |
96412690 | 1140 | struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1141 | struct batadv_hard_iface *if_incoming, |
1142 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1143 | { |
56303d34 SE |
1144 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1145 | struct batadv_neigh_node *neigh_node = NULL, *tmp_neigh_node; | |
89652331 | 1146 | struct batadv_neigh_ifinfo *neigh_ifinfo; |
6b5e971a SE |
1147 | u8 total_count; |
1148 | u8 orig_eq_count, neigh_rq_count, neigh_rq_inv, tq_own; | |
42d0b044 | 1149 | unsigned int neigh_rq_inv_cube, neigh_rq_max_cube; |
bbad0a5e | 1150 | int tq_asym_penalty, inv_asym_penalty, if_num, ret = 0; |
42d0b044 | 1151 | unsigned int combined_tq; |
c0398768 | 1152 | int tq_iface_penalty; |
fc957275 ML |
1153 | |
1154 | /* find corresponding one hop neighbor */ | |
1155 | rcu_read_lock(); | |
b67bfe0d | 1156 | hlist_for_each_entry_rcu(tmp_neigh_node, |
fc957275 | 1157 | &orig_neigh_node->neigh_list, list) { |
1eda58bf SE |
1158 | if (!batadv_compare_eth(tmp_neigh_node->addr, |
1159 | orig_neigh_node->orig)) | |
fc957275 ML |
1160 | continue; |
1161 | ||
1162 | if (tmp_neigh_node->if_incoming != if_incoming) | |
1163 | continue; | |
1164 | ||
77ae32e8 | 1165 | if (!kref_get_unless_zero(&tmp_neigh_node->refcount)) |
fc957275 ML |
1166 | continue; |
1167 | ||
1168 | neigh_node = tmp_neigh_node; | |
1169 | break; | |
1170 | } | |
1171 | rcu_read_unlock(); | |
1172 | ||
1173 | if (!neigh_node) | |
fe8bc396 SE |
1174 | neigh_node = batadv_iv_ogm_neigh_new(if_incoming, |
1175 | orig_neigh_node->orig, | |
1176 | orig_neigh_node, | |
863dd7a8 | 1177 | orig_neigh_node); |
fc957275 ML |
1178 | |
1179 | if (!neigh_node) | |
1180 | goto out; | |
1181 | ||
d7b2a97e | 1182 | /* if orig_node is direct neighbor update neigh_node last_seen */ |
fc957275 | 1183 | if (orig_node == orig_neigh_node) |
d7b2a97e | 1184 | neigh_node->last_seen = jiffies; |
fc957275 | 1185 | |
d7b2a97e | 1186 | orig_node->last_seen = jiffies; |
fc957275 ML |
1187 | |
1188 | /* find packet count of corresponding one hop neighbor */ | |
bbad0a5e AQ |
1189 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
1190 | if_num = if_incoming->if_num; | |
1191 | orig_eq_count = orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
89652331 SW |
1192 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, if_outgoing); |
1193 | if (neigh_ifinfo) { | |
1194 | neigh_rq_count = neigh_ifinfo->bat_iv.real_packet_count; | |
044fa3ae | 1195 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
89652331 SW |
1196 | } else { |
1197 | neigh_rq_count = 0; | |
1198 | } | |
bbad0a5e | 1199 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
fc957275 ML |
1200 | |
1201 | /* pay attention to not get a value bigger than 100 % */ | |
c67893d1 SE |
1202 | if (orig_eq_count > neigh_rq_count) |
1203 | total_count = neigh_rq_count; | |
1204 | else | |
1205 | total_count = orig_eq_count; | |
fc957275 | 1206 | |
9cfc7bd6 SE |
1207 | /* if we have too few packets (too less data) we set tq_own to zero |
1208 | * if we receive too few packets it is not considered bidirectional | |
1209 | */ | |
42d0b044 SE |
1210 | if (total_count < BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM || |
1211 | neigh_rq_count < BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM) | |
fc957275 ML |
1212 | tq_own = 0; |
1213 | else | |
1214 | /* neigh_node->real_packet_count is never zero as we | |
1215 | * only purge old information when getting new | |
9cfc7bd6 SE |
1216 | * information |
1217 | */ | |
42d0b044 | 1218 | tq_own = (BATADV_TQ_MAX_VALUE * total_count) / neigh_rq_count; |
fc957275 | 1219 | |
21a1236b | 1220 | /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does |
fc957275 ML |
1221 | * affect the nearly-symmetric links only a little, but |
1222 | * punishes asymmetric links more. This will give a value | |
1223 | * between 0 and TQ_MAX_VALUE | |
1224 | */ | |
42d0b044 SE |
1225 | neigh_rq_inv = BATADV_TQ_LOCAL_WINDOW_SIZE - neigh_rq_count; |
1226 | neigh_rq_inv_cube = neigh_rq_inv * neigh_rq_inv * neigh_rq_inv; | |
1227 | neigh_rq_max_cube = BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1228 | BATADV_TQ_LOCAL_WINDOW_SIZE * | |
1229 | BATADV_TQ_LOCAL_WINDOW_SIZE; | |
1230 | inv_asym_penalty = BATADV_TQ_MAX_VALUE * neigh_rq_inv_cube; | |
1231 | inv_asym_penalty /= neigh_rq_max_cube; | |
1232 | tq_asym_penalty = BATADV_TQ_MAX_VALUE - inv_asym_penalty; | |
1233 | ||
c0398768 SW |
1234 | /* penalize if the OGM is forwarded on the same interface. WiFi |
1235 | * interfaces and other half duplex devices suffer from throughput | |
1236 | * drops as they can't send and receive at the same time. | |
1237 | */ | |
1238 | tq_iface_penalty = BATADV_TQ_MAX_VALUE; | |
1239 | if (if_outgoing && (if_incoming == if_outgoing) && | |
1240 | batadv_is_wifi_netdev(if_outgoing->net_dev)) | |
1241 | tq_iface_penalty = batadv_hop_penalty(BATADV_TQ_MAX_VALUE, | |
1242 | bat_priv); | |
1243 | ||
1244 | combined_tq = batadv_ogm_packet->tq * | |
1245 | tq_own * | |
1246 | tq_asym_penalty * | |
1247 | tq_iface_penalty; | |
1248 | combined_tq /= BATADV_TQ_MAX_VALUE * | |
1249 | BATADV_TQ_MAX_VALUE * | |
1250 | BATADV_TQ_MAX_VALUE; | |
96412690 | 1251 | batadv_ogm_packet->tq = combined_tq; |
fc957275 | 1252 | |
39c75a51 | 1253 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
c0398768 | 1254 | "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 | 1255 | orig_node->orig, orig_neigh_node->orig, total_count, |
c0398768 SW |
1256 | neigh_rq_count, tq_own, tq_asym_penalty, tq_iface_penalty, |
1257 | batadv_ogm_packet->tq, if_incoming->net_dev->name, | |
1258 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT"); | |
fc957275 ML |
1259 | |
1260 | /* if link has the minimum required transmission quality | |
9cfc7bd6 SE |
1261 | * consider it bidirectional |
1262 | */ | |
96412690 | 1263 | if (batadv_ogm_packet->tq >= BATADV_TQ_TOTAL_BIDRECT_LIMIT) |
fc957275 ML |
1264 | ret = 1; |
1265 | ||
1266 | out: | |
1267 | if (neigh_node) | |
25bb2509 | 1268 | batadv_neigh_node_put(neigh_node); |
fc957275 ML |
1269 | return ret; |
1270 | } | |
1271 | ||
7c24bbbe SW |
1272 | /** |
1273 | * batadv_iv_ogm_update_seqnos - process a batman packet for all interfaces, | |
1274 | * adjust the sequence number and find out whether it is a duplicate | |
1275 | * @ethhdr: ethernet header of the packet | |
1276 | * @batadv_ogm_packet: OGM packet to be considered | |
1277 | * @if_incoming: interface on which the OGM packet was received | |
89652331 | 1278 | * @if_outgoing: interface for which the retransmission should be considered |
7c24bbbe | 1279 | * |
62fe710f | 1280 | * Return: duplicate status as enum batadv_dup_status |
fc957275 | 1281 | */ |
7c24bbbe | 1282 | static enum batadv_dup_status |
fe8bc396 | 1283 | batadv_iv_ogm_update_seqnos(const struct ethhdr *ethhdr, |
96412690 | 1284 | const struct batadv_ogm_packet *batadv_ogm_packet, |
89652331 SW |
1285 | const struct batadv_hard_iface *if_incoming, |
1286 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1287 | { |
56303d34 SE |
1288 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
1289 | struct batadv_orig_node *orig_node; | |
7351a482 | 1290 | struct batadv_orig_ifinfo *orig_ifinfo = NULL; |
89652331 SW |
1291 | struct batadv_neigh_node *neigh_node; |
1292 | struct batadv_neigh_ifinfo *neigh_ifinfo; | |
7c24bbbe | 1293 | int is_dup; |
6b5e971a | 1294 | s32 seq_diff; |
fc957275 | 1295 | int need_update = 0; |
7c24bbbe SW |
1296 | int set_mark; |
1297 | enum batadv_dup_status ret = BATADV_NO_DUP; | |
6b5e971a SE |
1298 | u32 seqno = ntohl(batadv_ogm_packet->seqno); |
1299 | u8 *neigh_addr; | |
1300 | u8 packet_count; | |
0538f759 | 1301 | unsigned long *bitmap; |
fc957275 | 1302 | |
bbad0a5e | 1303 | orig_node = batadv_iv_ogm_orig_get(bat_priv, batadv_ogm_packet->orig); |
fc957275 | 1304 | if (!orig_node) |
7c24bbbe | 1305 | return BATADV_NO_DUP; |
fc957275 | 1306 | |
7351a482 SW |
1307 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1308 | if (WARN_ON(!orig_ifinfo)) { | |
5d967310 | 1309 | batadv_orig_node_put(orig_node); |
7351a482 SW |
1310 | return 0; |
1311 | } | |
1312 | ||
bbad0a5e | 1313 | spin_lock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
7351a482 | 1314 | seq_diff = seqno - orig_ifinfo->last_real_seqno; |
fc957275 ML |
1315 | |
1316 | /* signalize caller that the packet is to be dropped. */ | |
1e5cc266 | 1317 | if (!hlist_empty(&orig_node->neigh_list) && |
30d3c511 | 1318 | batadv_window_protected(bat_priv, seq_diff, |
81f02683 SW |
1319 | BATADV_TQ_LOCAL_WINDOW_SIZE, |
1320 | &orig_ifinfo->batman_seqno_reset, NULL)) { | |
7c24bbbe | 1321 | ret = BATADV_PROTECTED; |
fc957275 | 1322 | goto out; |
7c24bbbe | 1323 | } |
fc957275 ML |
1324 | |
1325 | rcu_read_lock(); | |
89652331 SW |
1326 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { |
1327 | neigh_ifinfo = batadv_neigh_ifinfo_new(neigh_node, | |
1328 | if_outgoing); | |
1329 | if (!neigh_ifinfo) | |
1330 | continue; | |
1331 | ||
1332 | neigh_addr = neigh_node->addr; | |
1333 | is_dup = batadv_test_bit(neigh_ifinfo->bat_iv.real_bits, | |
7351a482 | 1334 | orig_ifinfo->last_real_seqno, |
7c24bbbe SW |
1335 | seqno); |
1336 | ||
1eda58bf | 1337 | if (batadv_compare_eth(neigh_addr, ethhdr->h_source) && |
89652331 | 1338 | neigh_node->if_incoming == if_incoming) { |
fc957275 | 1339 | set_mark = 1; |
7c24bbbe SW |
1340 | if (is_dup) |
1341 | ret = BATADV_NEIGH_DUP; | |
1342 | } else { | |
fc957275 | 1343 | set_mark = 0; |
7c24bbbe SW |
1344 | if (is_dup && (ret != BATADV_NEIGH_DUP)) |
1345 | ret = BATADV_ORIG_DUP; | |
1346 | } | |
fc957275 ML |
1347 | |
1348 | /* if the window moved, set the update flag. */ | |
89652331 | 1349 | bitmap = neigh_ifinfo->bat_iv.real_bits; |
0538f759 | 1350 | need_update |= batadv_bit_get_packet(bat_priv, bitmap, |
0f5f9322 | 1351 | seq_diff, set_mark); |
fc957275 | 1352 | |
89652331 | 1353 | packet_count = bitmap_weight(bitmap, |
bbb1f90e | 1354 | BATADV_TQ_LOCAL_WINDOW_SIZE); |
89652331 | 1355 | neigh_ifinfo->bat_iv.real_packet_count = packet_count; |
044fa3ae | 1356 | batadv_neigh_ifinfo_put(neigh_ifinfo); |
fc957275 ML |
1357 | } |
1358 | rcu_read_unlock(); | |
1359 | ||
1360 | if (need_update) { | |
39c75a51 | 1361 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
7351a482 SW |
1362 | "%s updating last_seqno: old %u, new %u\n", |
1363 | if_outgoing ? if_outgoing->net_dev->name : "DEFAULT", | |
1364 | orig_ifinfo->last_real_seqno, seqno); | |
1365 | orig_ifinfo->last_real_seqno = seqno; | |
fc957275 ML |
1366 | } |
1367 | ||
fc957275 | 1368 | out: |
bbad0a5e | 1369 | spin_unlock_bh(&orig_node->bat_iv.ogm_cnt_lock); |
5d967310 | 1370 | batadv_orig_node_put(orig_node); |
35f94779 | 1371 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 ML |
1372 | return ret; |
1373 | } | |
1374 | ||
7351a482 SW |
1375 | /** |
1376 | * batadv_iv_ogm_process_per_outif - process a batman iv OGM for an outgoing if | |
1377 | * @skb: the skb containing the OGM | |
95298a91 | 1378 | * @ogm_offset: offset from skb->data to start of ogm header |
7351a482 SW |
1379 | * @orig_node: the (cached) orig node for the originator of this OGM |
1380 | * @if_incoming: the interface where this packet was received | |
1381 | * @if_outgoing: the interface for which the packet should be considered | |
1382 | */ | |
1383 | static void | |
1384 | batadv_iv_ogm_process_per_outif(const struct sk_buff *skb, int ogm_offset, | |
1385 | struct batadv_orig_node *orig_node, | |
1386 | struct batadv_hard_iface *if_incoming, | |
1387 | struct batadv_hard_iface *if_outgoing) | |
fc957275 | 1388 | { |
56303d34 | 1389 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
4ff1e2a7 | 1390 | struct batadv_hardif_neigh_node *hardif_neigh = NULL; |
4f248cff SE |
1391 | struct batadv_neigh_node *router = NULL; |
1392 | struct batadv_neigh_node *router_router = NULL; | |
7351a482 SW |
1393 | struct batadv_orig_node *orig_neigh_node; |
1394 | struct batadv_orig_ifinfo *orig_ifinfo; | |
56303d34 | 1395 | struct batadv_neigh_node *orig_neigh_router = NULL; |
89652331 | 1396 | struct batadv_neigh_ifinfo *router_ifinfo = NULL; |
7351a482 | 1397 | struct batadv_ogm_packet *ogm_packet; |
7c24bbbe | 1398 | enum batadv_dup_status dup_status; |
7351a482 SW |
1399 | bool is_from_best_next_hop = false; |
1400 | bool is_single_hop_neigh = false; | |
1401 | bool sameseq, similar_ttl; | |
1402 | struct sk_buff *skb_priv; | |
1403 | struct ethhdr *ethhdr; | |
6b5e971a | 1404 | u8 *prev_sender; |
7351a482 | 1405 | int is_bidirect; |
fc957275 | 1406 | |
7351a482 SW |
1407 | /* create a private copy of the skb, as some functions change tq value |
1408 | * and/or flags. | |
fc957275 | 1409 | */ |
7351a482 SW |
1410 | skb_priv = skb_copy(skb, GFP_ATOMIC); |
1411 | if (!skb_priv) | |
fc957275 ML |
1412 | return; |
1413 | ||
7351a482 SW |
1414 | ethhdr = eth_hdr(skb_priv); |
1415 | ogm_packet = (struct batadv_ogm_packet *)(skb_priv->data + ogm_offset); | |
fc957275 | 1416 | |
7351a482 SW |
1417 | dup_status = batadv_iv_ogm_update_seqnos(ethhdr, ogm_packet, |
1418 | if_incoming, if_outgoing); | |
1419 | if (batadv_compare_eth(ethhdr->h_source, ogm_packet->orig)) | |
75cd33f8 | 1420 | is_single_hop_neigh = true; |
fc957275 | 1421 | |
7c24bbbe | 1422 | if (dup_status == BATADV_PROTECTED) { |
39c75a51 | 1423 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1424 | "Drop packet: packet within seqno protection time (sender: %pM)\n", |
1425 | ethhdr->h_source); | |
fc957275 ML |
1426 | goto out; |
1427 | } | |
1428 | ||
7351a482 | 1429 | if (ogm_packet->tq == 0) { |
39c75a51 | 1430 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1431 | "Drop packet: originator packet with tq equal 0\n"); |
fc957275 ML |
1432 | goto out; |
1433 | } | |
1434 | ||
4ff1e2a7 ML |
1435 | if (is_single_hop_neigh) { |
1436 | hardif_neigh = batadv_hardif_neigh_get(if_incoming, | |
1437 | ethhdr->h_source); | |
1438 | if (hardif_neigh) | |
1439 | hardif_neigh->last_seen = jiffies; | |
1440 | } | |
1441 | ||
7351a482 | 1442 | router = batadv_orig_router_get(orig_node, if_outgoing); |
0538f759 | 1443 | if (router) { |
7351a482 SW |
1444 | router_router = batadv_orig_router_get(router->orig_node, |
1445 | if_outgoing); | |
1446 | router_ifinfo = batadv_neigh_ifinfo_get(router, if_outgoing); | |
0538f759 | 1447 | } |
fc957275 | 1448 | |
7351a482 | 1449 | if ((router_ifinfo && router_ifinfo->bat_iv.tq_avg != 0) && |
1eda58bf | 1450 | (batadv_compare_eth(router->addr, ethhdr->h_source))) |
13b2541b ML |
1451 | is_from_best_next_hop = true; |
1452 | ||
7351a482 | 1453 | prev_sender = ogm_packet->prev_sender; |
fc957275 ML |
1454 | /* avoid temporary routing loops */ |
1455 | if (router && router_router && | |
1eda58bf | 1456 | (batadv_compare_eth(router->addr, prev_sender)) && |
7351a482 | 1457 | !(batadv_compare_eth(ogm_packet->orig, prev_sender)) && |
1eda58bf | 1458 | (batadv_compare_eth(router->addr, router_router->addr))) { |
39c75a51 | 1459 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf SE |
1460 | "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n", |
1461 | ethhdr->h_source); | |
fc957275 ML |
1462 | goto out; |
1463 | } | |
1464 | ||
7351a482 SW |
1465 | if (if_outgoing == BATADV_IF_DEFAULT) |
1466 | batadv_tvlv_ogm_receive(bat_priv, ogm_packet, orig_node); | |
ef261577 | 1467 | |
fc957275 | 1468 | /* if sender is a direct neighbor the sender mac equals |
9cfc7bd6 SE |
1469 | * originator mac |
1470 | */ | |
c67893d1 SE |
1471 | if (is_single_hop_neigh) |
1472 | orig_neigh_node = orig_node; | |
1473 | else | |
bbad0a5e AQ |
1474 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, |
1475 | ethhdr->h_source); | |
c67893d1 | 1476 | |
fc957275 ML |
1477 | if (!orig_neigh_node) |
1478 | goto out; | |
1479 | ||
d56b1705 MH |
1480 | /* Update nc_nodes of the originator */ |
1481 | batadv_nc_update_nc_node(bat_priv, orig_node, orig_neigh_node, | |
7351a482 | 1482 | ogm_packet, is_single_hop_neigh); |
d56b1705 | 1483 | |
7351a482 SW |
1484 | orig_neigh_router = batadv_orig_router_get(orig_neigh_node, |
1485 | if_outgoing); | |
fc957275 ML |
1486 | |
1487 | /* drop packet if sender is not a direct neighbor and if we | |
9cfc7bd6 SE |
1488 | * don't route towards it |
1489 | */ | |
fc957275 | 1490 | if (!is_single_hop_neigh && (!orig_neigh_router)) { |
39c75a51 | 1491 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1492 | "Drop packet: OGM via unknown neighbor!\n"); |
fc957275 ML |
1493 | goto out_neigh; |
1494 | } | |
1495 | ||
fe8bc396 | 1496 | is_bidirect = batadv_iv_ogm_calc_tq(orig_node, orig_neigh_node, |
7351a482 SW |
1497 | ogm_packet, if_incoming, |
1498 | if_outgoing); | |
fc957275 | 1499 | |
fc957275 | 1500 | /* update ranking if it is not a duplicate or has the same |
9cfc7bd6 SE |
1501 | * seqno and similar ttl as the non-duplicate |
1502 | */ | |
7351a482 SW |
1503 | orig_ifinfo = batadv_orig_ifinfo_new(orig_node, if_outgoing); |
1504 | if (!orig_ifinfo) | |
1505 | goto out_neigh; | |
1506 | ||
1507 | sameseq = orig_ifinfo->last_real_seqno == ntohl(ogm_packet->seqno); | |
1508 | similar_ttl = (orig_ifinfo->last_ttl - 3) <= ogm_packet->ttl; | |
1509 | ||
7c24bbbe | 1510 | if (is_bidirect && ((dup_status == BATADV_NO_DUP) || |
7351a482 SW |
1511 | (sameseq && similar_ttl))) { |
1512 | batadv_iv_ogm_orig_update(bat_priv, orig_node, | |
1513 | orig_ifinfo, ethhdr, | |
1514 | ogm_packet, if_incoming, | |
1515 | if_outgoing, dup_status); | |
1516 | } | |
35f94779 | 1517 | batadv_orig_ifinfo_put(orig_ifinfo); |
fc957275 | 1518 | |
ef0a937f SW |
1519 | /* only forward for specific interface, not for the default one. */ |
1520 | if (if_outgoing == BATADV_IF_DEFAULT) | |
1521 | goto out_neigh; | |
1522 | ||
fc957275 ML |
1523 | /* is single hop (direct) neighbor */ |
1524 | if (is_single_hop_neigh) { | |
7351a482 SW |
1525 | /* OGMs from secondary interfaces should only scheduled once |
1526 | * per interface where it has been received, not multiple times | |
1527 | */ | |
1528 | if ((ogm_packet->ttl <= 2) && | |
1529 | (if_incoming != if_outgoing)) { | |
1530 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1531 | "Drop packet: OGM from secondary interface and wrong outgoing interface\n"); | |
1532 | goto out_neigh; | |
1533 | } | |
fc957275 | 1534 | /* mark direct link on incoming interface */ |
7351a482 | 1535 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1536 | is_single_hop_neigh, |
ef0a937f SW |
1537 | is_from_best_next_hop, if_incoming, |
1538 | if_outgoing); | |
fc957275 | 1539 | |
39c75a51 | 1540 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1541 | "Forwarding packet: rebroadcast neighbor packet with direct link flag\n"); |
fc957275 ML |
1542 | goto out_neigh; |
1543 | } | |
1544 | ||
1545 | /* multihop originator */ | |
fe8bc396 | 1546 | if (!is_bidirect) { |
39c75a51 | 1547 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1548 | "Drop packet: not received via bidirectional link\n"); |
fc957275 ML |
1549 | goto out_neigh; |
1550 | } | |
1551 | ||
7c24bbbe | 1552 | if (dup_status == BATADV_NEIGH_DUP) { |
39c75a51 | 1553 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1554 | "Drop packet: duplicate packet received\n"); |
fc957275 ML |
1555 | goto out_neigh; |
1556 | } | |
1557 | ||
39c75a51 | 1558 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, |
1eda58bf | 1559 | "Forwarding packet: rebroadcast originator packet\n"); |
7351a482 | 1560 | batadv_iv_ogm_forward(orig_node, ethhdr, ogm_packet, |
fe8bc396 | 1561 | is_single_hop_neigh, is_from_best_next_hop, |
ef0a937f | 1562 | if_incoming, if_outgoing); |
fc957275 ML |
1563 | |
1564 | out_neigh: | |
1565 | if ((orig_neigh_node) && (!is_single_hop_neigh)) | |
5d967310 | 1566 | batadv_orig_node_put(orig_neigh_node); |
fc957275 | 1567 | out: |
c1e517fb | 1568 | if (router_ifinfo) |
044fa3ae | 1569 | batadv_neigh_ifinfo_put(router_ifinfo); |
fc957275 | 1570 | if (router) |
25bb2509 | 1571 | batadv_neigh_node_put(router); |
fc957275 | 1572 | if (router_router) |
25bb2509 | 1573 | batadv_neigh_node_put(router_router); |
fc957275 | 1574 | if (orig_neigh_router) |
25bb2509 | 1575 | batadv_neigh_node_put(orig_neigh_router); |
4ff1e2a7 | 1576 | if (hardif_neigh) |
accadc35 | 1577 | batadv_hardif_neigh_put(hardif_neigh); |
fc957275 | 1578 | |
7351a482 SW |
1579 | kfree_skb(skb_priv); |
1580 | } | |
1581 | ||
1582 | /** | |
1583 | * batadv_iv_ogm_process - process an incoming batman iv OGM | |
1584 | * @skb: the skb containing the OGM | |
1585 | * @ogm_offset: offset to the OGM which should be processed (for aggregates) | |
1586 | * @if_incoming: the interface where this packet was receved | |
1587 | */ | |
1588 | static void batadv_iv_ogm_process(const struct sk_buff *skb, int ogm_offset, | |
1589 | struct batadv_hard_iface *if_incoming) | |
1590 | { | |
1591 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); | |
1592 | struct batadv_orig_node *orig_neigh_node, *orig_node; | |
1593 | struct batadv_hard_iface *hard_iface; | |
1594 | struct batadv_ogm_packet *ogm_packet; | |
6b5e971a | 1595 | u32 if_incoming_seqno; |
7351a482 SW |
1596 | bool has_directlink_flag; |
1597 | struct ethhdr *ethhdr; | |
1598 | bool is_my_oldorig = false; | |
1599 | bool is_my_addr = false; | |
1600 | bool is_my_orig = false; | |
1601 | ||
1602 | ogm_packet = (struct batadv_ogm_packet *)(skb->data + ogm_offset); | |
1603 | ethhdr = eth_hdr(skb); | |
1604 | ||
1605 | /* Silently drop when the batman packet is actually not a | |
1606 | * correct packet. | |
1607 | * | |
1608 | * This might happen if a packet is padded (e.g. Ethernet has a | |
1609 | * minimum frame length of 64 byte) and the aggregation interprets | |
1610 | * it as an additional length. | |
1611 | * | |
1612 | * TODO: A more sane solution would be to have a bit in the | |
1613 | * batadv_ogm_packet to detect whether the packet is the last | |
1614 | * packet in an aggregation. Here we expect that the padding | |
1615 | * is always zero (or not 0x01) | |
1616 | */ | |
1617 | if (ogm_packet->packet_type != BATADV_IV_OGM) | |
1618 | return; | |
1619 | ||
1620 | /* could be changed by schedule_own_packet() */ | |
1621 | if_incoming_seqno = atomic_read(&if_incoming->bat_iv.ogm_seqno); | |
1622 | ||
1623 | if (ogm_packet->flags & BATADV_DIRECTLINK) | |
1624 | has_directlink_flag = true; | |
1625 | else | |
1626 | has_directlink_flag = false; | |
1627 | ||
1628 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1629 | "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", | |
1630 | ethhdr->h_source, if_incoming->net_dev->name, | |
1631 | if_incoming->net_dev->dev_addr, ogm_packet->orig, | |
1632 | ogm_packet->prev_sender, ntohl(ogm_packet->seqno), | |
1633 | ogm_packet->tq, ogm_packet->ttl, | |
1634 | ogm_packet->version, has_directlink_flag); | |
1635 | ||
1636 | rcu_read_lock(); | |
1637 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1638 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1639 | continue; | |
1640 | ||
1641 | if (hard_iface->soft_iface != if_incoming->soft_iface) | |
1642 | continue; | |
1643 | ||
1644 | if (batadv_compare_eth(ethhdr->h_source, | |
1645 | hard_iface->net_dev->dev_addr)) | |
1646 | is_my_addr = true; | |
1647 | ||
1648 | if (batadv_compare_eth(ogm_packet->orig, | |
1649 | hard_iface->net_dev->dev_addr)) | |
1650 | is_my_orig = true; | |
1651 | ||
1652 | if (batadv_compare_eth(ogm_packet->prev_sender, | |
1653 | hard_iface->net_dev->dev_addr)) | |
1654 | is_my_oldorig = true; | |
1655 | } | |
1656 | rcu_read_unlock(); | |
1657 | ||
1658 | if (is_my_addr) { | |
1659 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1660 | "Drop packet: received my own broadcast (sender: %pM)\n", | |
1661 | ethhdr->h_source); | |
1662 | return; | |
1663 | } | |
1664 | ||
1665 | if (is_my_orig) { | |
1666 | unsigned long *word; | |
1667 | int offset; | |
6b5e971a SE |
1668 | s32 bit_pos; |
1669 | s16 if_num; | |
1670 | u8 *weight; | |
7351a482 SW |
1671 | |
1672 | orig_neigh_node = batadv_iv_ogm_orig_get(bat_priv, | |
1673 | ethhdr->h_source); | |
1674 | if (!orig_neigh_node) | |
1675 | return; | |
1676 | ||
1677 | /* neighbor has to indicate direct link and it has to | |
1678 | * come via the corresponding interface | |
1679 | * save packet seqno for bidirectional check | |
1680 | */ | |
1681 | if (has_directlink_flag && | |
1682 | batadv_compare_eth(if_incoming->net_dev->dev_addr, | |
1683 | ogm_packet->orig)) { | |
1684 | if_num = if_incoming->if_num; | |
1685 | offset = if_num * BATADV_NUM_WORDS; | |
1686 | ||
1687 | spin_lock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
32db6aaa | 1688 | word = &orig_neigh_node->bat_iv.bcast_own[offset]; |
7351a482 SW |
1689 | bit_pos = if_incoming_seqno - 2; |
1690 | bit_pos -= ntohl(ogm_packet->seqno); | |
1691 | batadv_set_bit(word, bit_pos); | |
1692 | weight = &orig_neigh_node->bat_iv.bcast_own_sum[if_num]; | |
1693 | *weight = bitmap_weight(word, | |
1694 | BATADV_TQ_LOCAL_WINDOW_SIZE); | |
1695 | spin_unlock_bh(&orig_neigh_node->bat_iv.ogm_cnt_lock); | |
1696 | } | |
1697 | ||
1698 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1699 | "Drop packet: originator packet from myself (via neighbor)\n"); | |
5d967310 | 1700 | batadv_orig_node_put(orig_neigh_node); |
7351a482 SW |
1701 | return; |
1702 | } | |
1703 | ||
1704 | if (is_my_oldorig) { | |
1705 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1706 | "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n", | |
1707 | ethhdr->h_source); | |
1708 | return; | |
1709 | } | |
1710 | ||
1711 | if (ogm_packet->flags & BATADV_NOT_BEST_NEXT_HOP) { | |
1712 | batadv_dbg(BATADV_DBG_BATMAN, bat_priv, | |
1713 | "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n", | |
1714 | ethhdr->h_source); | |
1715 | return; | |
1716 | } | |
1717 | ||
1718 | orig_node = batadv_iv_ogm_orig_get(bat_priv, ogm_packet->orig); | |
1719 | if (!orig_node) | |
1720 | return; | |
1721 | ||
1722 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1723 | if_incoming, BATADV_IF_DEFAULT); | |
1724 | ||
1725 | rcu_read_lock(); | |
1726 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1727 | if (hard_iface->if_status != BATADV_IF_ACTIVE) | |
1728 | continue; | |
1729 | ||
1730 | if (hard_iface->soft_iface != bat_priv->soft_iface) | |
1731 | continue; | |
1732 | ||
1733 | batadv_iv_ogm_process_per_outif(skb, ogm_offset, orig_node, | |
1734 | if_incoming, hard_iface); | |
1735 | } | |
1736 | rcu_read_unlock(); | |
1737 | ||
5d967310 | 1738 | batadv_orig_node_put(orig_node); |
fc957275 ML |
1739 | } |
1740 | ||
fe8bc396 | 1741 | static int batadv_iv_ogm_receive(struct sk_buff *skb, |
56303d34 | 1742 | struct batadv_hard_iface *if_incoming) |
fc957275 | 1743 | { |
56303d34 | 1744 | struct batadv_priv *bat_priv = netdev_priv(if_incoming->soft_iface); |
7351a482 | 1745 | struct batadv_ogm_packet *ogm_packet; |
6b5e971a | 1746 | u8 *packet_pos; |
7351a482 | 1747 | int ogm_offset; |
ef261577 | 1748 | bool ret; |
c3e29312 | 1749 | |
7e071c79 | 1750 | ret = batadv_check_management_packet(skb, if_incoming, BATADV_OGM_HLEN); |
c3e29312 ML |
1751 | if (!ret) |
1752 | return NET_RX_DROP; | |
fc957275 | 1753 | |
edbf12ba ML |
1754 | /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface |
1755 | * that does not have B.A.T.M.A.N. IV enabled ? | |
1756 | */ | |
fe8bc396 | 1757 | if (bat_priv->bat_algo_ops->bat_ogm_emit != batadv_iv_ogm_emit) |
edbf12ba ML |
1758 | return NET_RX_DROP; |
1759 | ||
d69909d2 SE |
1760 | batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX); |
1761 | batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES, | |
f8214865 MH |
1762 | skb->len + ETH_HLEN); |
1763 | ||
7351a482 SW |
1764 | ogm_offset = 0; |
1765 | ogm_packet = (struct batadv_ogm_packet *)skb->data; | |
fc957275 ML |
1766 | |
1767 | /* unpack the aggregated packets and process them one by one */ | |
7351a482 SW |
1768 | while (batadv_iv_ogm_aggr_packet(ogm_offset, skb_headlen(skb), |
1769 | ogm_packet->tvlv_len)) { | |
1770 | batadv_iv_ogm_process(skb, ogm_offset, if_incoming); | |
fc957275 | 1771 | |
7351a482 SW |
1772 | ogm_offset += BATADV_OGM_HLEN; |
1773 | ogm_offset += ntohs(ogm_packet->tvlv_len); | |
fc957275 | 1774 | |
7351a482 SW |
1775 | packet_pos = skb->data + ogm_offset; |
1776 | ogm_packet = (struct batadv_ogm_packet *)packet_pos; | |
b47506d9 | 1777 | } |
c3e29312 ML |
1778 | |
1779 | kfree_skb(skb); | |
1780 | return NET_RX_SUCCESS; | |
fc957275 | 1781 | } |
1c280471 | 1782 | |
1b371d13 SW |
1783 | /** |
1784 | * batadv_iv_ogm_orig_print_neigh - print neighbors for the originator table | |
89652331 SW |
1785 | * @orig_node: the orig_node for which the neighbors are printed |
1786 | * @if_outgoing: outgoing interface for these entries | |
1787 | * @seq: debugfs table seq_file struct | |
1788 | * | |
1789 | * Must be called while holding an rcu lock. | |
1790 | */ | |
1791 | static void | |
1792 | batadv_iv_ogm_orig_print_neigh(struct batadv_orig_node *orig_node, | |
1793 | struct batadv_hard_iface *if_outgoing, | |
1794 | struct seq_file *seq) | |
1795 | { | |
1796 | struct batadv_neigh_node *neigh_node; | |
1797 | struct batadv_neigh_ifinfo *n_ifinfo; | |
1798 | ||
1799 | hlist_for_each_entry_rcu(neigh_node, &orig_node->neigh_list, list) { | |
1800 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, if_outgoing); | |
1801 | if (!n_ifinfo) | |
1802 | continue; | |
1803 | ||
1804 | seq_printf(seq, " %pM (%3i)", | |
1805 | neigh_node->addr, | |
1806 | n_ifinfo->bat_iv.tq_avg); | |
1807 | ||
044fa3ae | 1808 | batadv_neigh_ifinfo_put(n_ifinfo); |
89652331 SW |
1809 | } |
1810 | } | |
1811 | ||
737a2a22 AQ |
1812 | /** |
1813 | * batadv_iv_ogm_orig_print - print the originator table | |
1814 | * @bat_priv: the bat priv with all the soft interface information | |
1815 | * @seq: debugfs table seq_file struct | |
cb1c92ec | 1816 | * @if_outgoing: the outgoing interface for which this should be printed |
737a2a22 AQ |
1817 | */ |
1818 | static void batadv_iv_ogm_orig_print(struct batadv_priv *bat_priv, | |
cb1c92ec SW |
1819 | struct seq_file *seq, |
1820 | struct batadv_hard_iface *if_outgoing) | |
737a2a22 | 1821 | { |
89652331 | 1822 | struct batadv_neigh_node *neigh_node; |
737a2a22 AQ |
1823 | struct batadv_hashtable *hash = bat_priv->orig_hash; |
1824 | int last_seen_msecs, last_seen_secs; | |
1825 | struct batadv_orig_node *orig_node; | |
89652331 | 1826 | struct batadv_neigh_ifinfo *n_ifinfo; |
737a2a22 AQ |
1827 | unsigned long last_seen_jiffies; |
1828 | struct hlist_head *head; | |
1829 | int batman_count = 0; | |
6b5e971a | 1830 | u32 i; |
737a2a22 AQ |
1831 | |
1832 | seq_printf(seq, " %-15s %s (%s/%i) %17s [%10s]: %20s ...\n", | |
1833 | "Originator", "last-seen", "#", BATADV_TQ_MAX_VALUE, | |
1834 | "Nexthop", "outgoingIF", "Potential nexthops"); | |
1835 | ||
1836 | for (i = 0; i < hash->size; i++) { | |
1837 | head = &hash->table[i]; | |
1838 | ||
1839 | rcu_read_lock(); | |
1840 | hlist_for_each_entry_rcu(orig_node, head, hash_entry) { | |
7351a482 | 1841 | neigh_node = batadv_orig_router_get(orig_node, |
cb1c92ec | 1842 | if_outgoing); |
737a2a22 AQ |
1843 | if (!neigh_node) |
1844 | continue; | |
1845 | ||
89652331 | 1846 | n_ifinfo = batadv_neigh_ifinfo_get(neigh_node, |
cb1c92ec | 1847 | if_outgoing); |
89652331 SW |
1848 | if (!n_ifinfo) |
1849 | goto next; | |
1850 | ||
1851 | if (n_ifinfo->bat_iv.tq_avg == 0) | |
737a2a22 AQ |
1852 | goto next; |
1853 | ||
1854 | last_seen_jiffies = jiffies - orig_node->last_seen; | |
1855 | last_seen_msecs = jiffies_to_msecs(last_seen_jiffies); | |
1856 | last_seen_secs = last_seen_msecs / 1000; | |
1857 | last_seen_msecs = last_seen_msecs % 1000; | |
1858 | ||
1859 | seq_printf(seq, "%pM %4i.%03is (%3i) %pM [%10s]:", | |
1860 | orig_node->orig, last_seen_secs, | |
89652331 | 1861 | last_seen_msecs, n_ifinfo->bat_iv.tq_avg, |
737a2a22 AQ |
1862 | neigh_node->addr, |
1863 | neigh_node->if_incoming->net_dev->name); | |
1864 | ||
cb1c92ec SW |
1865 | batadv_iv_ogm_orig_print_neigh(orig_node, if_outgoing, |
1866 | seq); | |
737a2a22 AQ |
1867 | seq_puts(seq, "\n"); |
1868 | batman_count++; | |
1869 | ||
1870 | next: | |
25bb2509 | 1871 | batadv_neigh_node_put(neigh_node); |
89652331 | 1872 | if (n_ifinfo) |
044fa3ae | 1873 | batadv_neigh_ifinfo_put(n_ifinfo); |
737a2a22 AQ |
1874 | } |
1875 | rcu_read_unlock(); | |
1876 | } | |
1877 | ||
1878 | if (batman_count == 0) | |
1879 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1880 | } | |
1881 | ||
7587405a ML |
1882 | /** |
1883 | * batadv_iv_hardif_neigh_print - print a single hop neighbour node | |
1884 | * @seq: neighbour table seq_file struct | |
1885 | * @hardif_neigh: hardif neighbour information | |
1886 | */ | |
1887 | static void | |
1888 | batadv_iv_hardif_neigh_print(struct seq_file *seq, | |
1889 | struct batadv_hardif_neigh_node *hardif_neigh) | |
1890 | { | |
1891 | int last_secs, last_msecs; | |
1892 | ||
1893 | last_secs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) / 1000; | |
1894 | last_msecs = jiffies_to_msecs(jiffies - hardif_neigh->last_seen) % 1000; | |
1895 | ||
1896 | seq_printf(seq, " %10s %pM %4i.%03is\n", | |
1897 | hardif_neigh->if_incoming->net_dev->name, | |
1898 | hardif_neigh->addr, last_secs, last_msecs); | |
1899 | } | |
1900 | ||
1901 | /** | |
1902 | * batadv_iv_ogm_neigh_print - print the single hop neighbour list | |
1903 | * @bat_priv: the bat priv with all the soft interface information | |
1904 | * @seq: neighbour table seq_file struct | |
1905 | */ | |
1906 | static void batadv_iv_neigh_print(struct batadv_priv *bat_priv, | |
1907 | struct seq_file *seq) | |
1908 | { | |
1909 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1910 | struct batadv_hardif_neigh_node *hardif_neigh; | |
1911 | struct batadv_hard_iface *hard_iface; | |
1912 | int batman_count = 0; | |
1913 | ||
1914 | seq_printf(seq, " %10s %-13s %s\n", | |
1915 | "IF", "Neighbor", "last-seen"); | |
1916 | ||
1917 | rcu_read_lock(); | |
1918 | list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) { | |
1919 | if (hard_iface->soft_iface != net_dev) | |
1920 | continue; | |
1921 | ||
1922 | hlist_for_each_entry_rcu(hardif_neigh, | |
1923 | &hard_iface->neigh_list, list) { | |
1924 | batadv_iv_hardif_neigh_print(seq, hardif_neigh); | |
1925 | batman_count++; | |
1926 | } | |
1927 | } | |
1928 | rcu_read_unlock(); | |
1929 | ||
1930 | if (batman_count == 0) | |
1931 | seq_puts(seq, "No batman nodes in range ...\n"); | |
1932 | } | |
1933 | ||
a3285a8f AQ |
1934 | /** |
1935 | * batadv_iv_ogm_neigh_cmp - compare the metrics of two neighbors | |
1936 | * @neigh1: the first neighbor object of the comparison | |
89652331 | 1937 | * @if_outgoing1: outgoing interface for the first neighbor |
a3285a8f | 1938 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1939 | * @if_outgoing2: outgoing interface for the second neighbor |
a3285a8f | 1940 | * |
62fe710f | 1941 | * Return: a value less, equal to or greater than 0 if the metric via neigh1 is |
a3285a8f AQ |
1942 | * lower, the same as or higher than the metric via neigh2 |
1943 | */ | |
1944 | static int batadv_iv_ogm_neigh_cmp(struct batadv_neigh_node *neigh1, | |
89652331 SW |
1945 | struct batadv_hard_iface *if_outgoing1, |
1946 | struct batadv_neigh_node *neigh2, | |
1947 | struct batadv_hard_iface *if_outgoing2) | |
a3285a8f | 1948 | { |
89652331 | 1949 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 1950 | u8 tq1, tq2; |
89652331 SW |
1951 | int diff; |
1952 | ||
1953 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); | |
1954 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
a3285a8f | 1955 | |
89652331 SW |
1956 | if (!neigh1_ifinfo || !neigh2_ifinfo) { |
1957 | diff = 0; | |
1958 | goto out; | |
1959 | } | |
a3285a8f | 1960 | |
89652331 SW |
1961 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; |
1962 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
1963 | diff = tq1 - tq2; | |
1964 | ||
1965 | out: | |
1966 | if (neigh1_ifinfo) | |
044fa3ae | 1967 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 1968 | if (neigh2_ifinfo) |
044fa3ae | 1969 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 SW |
1970 | |
1971 | return diff; | |
a3285a8f AQ |
1972 | } |
1973 | ||
c43c981e | 1974 | /** |
18165f6f SW |
1975 | * batadv_iv_ogm_neigh_is_sob - check if neigh1 is similarly good or better |
1976 | * than neigh2 from the metric prospective | |
c43c981e | 1977 | * @neigh1: the first neighbor object of the comparison |
95298a91 | 1978 | * @if_outgoing1: outgoing interface for the first neighbor |
c43c981e | 1979 | * @neigh2: the second neighbor object of the comparison |
89652331 | 1980 | * @if_outgoing2: outgoing interface for the second neighbor |
95298a91 | 1981 | * |
62fe710f | 1982 | * Return: true if the metric via neigh1 is equally good or better than |
89652331 | 1983 | * the metric via neigh2, false otherwise. |
c43c981e | 1984 | */ |
89652331 | 1985 | static bool |
18165f6f | 1986 | batadv_iv_ogm_neigh_is_sob(struct batadv_neigh_node *neigh1, |
89652331 SW |
1987 | struct batadv_hard_iface *if_outgoing1, |
1988 | struct batadv_neigh_node *neigh2, | |
1989 | struct batadv_hard_iface *if_outgoing2) | |
c43c981e | 1990 | { |
89652331 | 1991 | struct batadv_neigh_ifinfo *neigh1_ifinfo, *neigh2_ifinfo; |
6b5e971a | 1992 | u8 tq1, tq2; |
89652331 | 1993 | bool ret; |
c43c981e | 1994 | |
89652331 SW |
1995 | neigh1_ifinfo = batadv_neigh_ifinfo_get(neigh1, if_outgoing1); |
1996 | neigh2_ifinfo = batadv_neigh_ifinfo_get(neigh2, if_outgoing2); | |
1997 | ||
1998 | /* we can't say that the metric is better */ | |
1999 | if (!neigh1_ifinfo || !neigh2_ifinfo) { | |
2000 | ret = false; | |
2001 | goto out; | |
2002 | } | |
2003 | ||
2004 | tq1 = neigh1_ifinfo->bat_iv.tq_avg; | |
2005 | tq2 = neigh2_ifinfo->bat_iv.tq_avg; | |
2006 | ret = (tq1 - tq2) > -BATADV_TQ_SIMILARITY_THRESHOLD; | |
2007 | ||
2008 | out: | |
2009 | if (neigh1_ifinfo) | |
044fa3ae | 2010 | batadv_neigh_ifinfo_put(neigh1_ifinfo); |
89652331 | 2011 | if (neigh2_ifinfo) |
044fa3ae | 2012 | batadv_neigh_ifinfo_put(neigh2_ifinfo); |
89652331 SW |
2013 | |
2014 | return ret; | |
c43c981e AQ |
2015 | } |
2016 | ||
56303d34 | 2017 | static struct batadv_algo_ops batadv_batman_iv __read_mostly = { |
519d3497 | 2018 | .name = "BATMAN_IV", |
fe8bc396 SE |
2019 | .bat_iface_enable = batadv_iv_ogm_iface_enable, |
2020 | .bat_iface_disable = batadv_iv_ogm_iface_disable, | |
2021 | .bat_iface_update_mac = batadv_iv_ogm_iface_update_mac, | |
2022 | .bat_primary_iface_set = batadv_iv_ogm_primary_iface_set, | |
2023 | .bat_ogm_schedule = batadv_iv_ogm_schedule, | |
2024 | .bat_ogm_emit = batadv_iv_ogm_emit, | |
a3285a8f | 2025 | .bat_neigh_cmp = batadv_iv_ogm_neigh_cmp, |
18165f6f | 2026 | .bat_neigh_is_similar_or_better = batadv_iv_ogm_neigh_is_sob, |
7587405a | 2027 | .bat_neigh_print = batadv_iv_neigh_print, |
737a2a22 | 2028 | .bat_orig_print = batadv_iv_ogm_orig_print, |
d0015fdd AQ |
2029 | .bat_orig_free = batadv_iv_ogm_orig_free, |
2030 | .bat_orig_add_if = batadv_iv_ogm_orig_add_if, | |
2031 | .bat_orig_del_if = batadv_iv_ogm_orig_del_if, | |
1c280471 ML |
2032 | }; |
2033 | ||
81c524f7 | 2034 | int __init batadv_iv_init(void) |
1c280471 | 2035 | { |
c3e29312 ML |
2036 | int ret; |
2037 | ||
2038 | /* batman originator packet */ | |
acd34afa SE |
2039 | ret = batadv_recv_handler_register(BATADV_IV_OGM, |
2040 | batadv_iv_ogm_receive); | |
c3e29312 ML |
2041 | if (ret < 0) |
2042 | goto out; | |
2043 | ||
fe8bc396 | 2044 | ret = batadv_algo_register(&batadv_batman_iv); |
c3e29312 ML |
2045 | if (ret < 0) |
2046 | goto handler_unregister; | |
2047 | ||
2048 | goto out; | |
2049 | ||
2050 | handler_unregister: | |
acd34afa | 2051 | batadv_recv_handler_unregister(BATADV_IV_OGM); |
c3e29312 ML |
2052 | out: |
2053 | return ret; | |
1c280471 | 2054 | } |