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-rw-r--r--net/batman-adv/routing.c669
1 files changed, 21 insertions, 648 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c
index 0f32c818874..f961cc5eade 100644
--- a/net/batman-adv/routing.c
+++ b/net/batman-adv/routing.c
@@ -22,18 +22,14 @@
22#include "main.h" 22#include "main.h"
23#include "routing.h" 23#include "routing.h"
24#include "send.h" 24#include "send.h"
25#include "hash.h"
26#include "soft-interface.h" 25#include "soft-interface.h"
27#include "hard-interface.h" 26#include "hard-interface.h"
28#include "icmp_socket.h" 27#include "icmp_socket.h"
29#include "translation-table.h" 28#include "translation-table.h"
30#include "originator.h" 29#include "originator.h"
31#include "ring_buffer.h"
32#include "vis.h" 30#include "vis.h"
33#include "aggregation.h"
34#include "gateway_common.h"
35#include "gateway_client.h"
36#include "unicast.h" 31#include "unicast.h"
32#include "bat_ogm.h"
37 33
38void slide_own_bcast_window(struct hard_iface *hard_iface) 34void slide_own_bcast_window(struct hard_iface *hard_iface)
39{ 35{
@@ -64,69 +60,9 @@ void slide_own_bcast_window(struct hard_iface *hard_iface)
64 } 60 }
65} 61}
66 62
67static void update_transtable(struct bat_priv *bat_priv, 63static void _update_route(struct bat_priv *bat_priv,
68 struct orig_node *orig_node, 64 struct orig_node *orig_node,
69 const unsigned char *tt_buff, 65 struct neigh_node *neigh_node)
70 uint8_t tt_num_changes, uint8_t ttvn,
71 uint16_t tt_crc)
72{
73 uint8_t orig_ttvn = (uint8_t)atomic_read(&orig_node->last_ttvn);
74 bool full_table = true;
75
76 /* the ttvn increased by one -> we can apply the attached changes */
77 if (ttvn - orig_ttvn == 1) {
78 /* the OGM could not contain the changes because they were too
79 * many to fit in one frame or because they have already been
80 * sent TT_OGM_APPEND_MAX times. In this case send a tt
81 * request */
82 if (!tt_num_changes) {
83 full_table = false;
84 goto request_table;
85 }
86
87 tt_update_changes(bat_priv, orig_node, tt_num_changes, ttvn,
88 (struct tt_change *)tt_buff);
89
90 /* Even if we received the crc into the OGM, we prefer
91 * to recompute it to spot any possible inconsistency
92 * in the global table */
93 orig_node->tt_crc = tt_global_crc(bat_priv, orig_node);
94
95 /* The ttvn alone is not enough to guarantee consistency
96 * because a single value could repesent different states
97 * (due to the wrap around). Thus a node has to check whether
98 * the resulting table (after applying the changes) is still
99 * consistent or not. E.g. a node could disconnect while its
100 * ttvn is X and reconnect on ttvn = X + TTVN_MAX: in this case
101 * checking the CRC value is mandatory to detect the
102 * inconsistency */
103 if (orig_node->tt_crc != tt_crc)
104 goto request_table;
105
106 /* Roaming phase is over: tables are in sync again. I can
107 * unset the flag */
108 orig_node->tt_poss_change = false;
109 } else {
110 /* if we missed more than one change or our tables are not
111 * in sync anymore -> request fresh tt data */
112 if (ttvn != orig_ttvn || orig_node->tt_crc != tt_crc) {
113request_table:
114 bat_dbg(DBG_TT, bat_priv, "TT inconsistency for %pM. "
115 "Need to retrieve the correct information "
116 "(ttvn: %u last_ttvn: %u crc: %u last_crc: "
117 "%u num_changes: %u)\n", orig_node->orig, ttvn,
118 orig_ttvn, tt_crc, orig_node->tt_crc,
119 tt_num_changes);
120 send_tt_request(bat_priv, orig_node, ttvn, tt_crc,
121 full_table);
122 return;
123 }
124 }
125}
126
127static void update_route(struct bat_priv *bat_priv,
128 struct orig_node *orig_node,
129 struct neigh_node *neigh_node)
130{ 66{
131 struct neigh_node *curr_router; 67 struct neigh_node *curr_router;
132 68
@@ -170,8 +106,8 @@ static void update_route(struct bat_priv *bat_priv,
170 neigh_node_free_ref(curr_router); 106 neigh_node_free_ref(curr_router);
171} 107}
172 108
173void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node, 109void update_route(struct bat_priv *bat_priv, struct orig_node *orig_node,
174 struct neigh_node *neigh_node) 110 struct neigh_node *neigh_node)
175{ 111{
176 struct neigh_node *router = NULL; 112 struct neigh_node *router = NULL;
177 113
@@ -181,116 +117,13 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
181 router = orig_node_get_router(orig_node); 117 router = orig_node_get_router(orig_node);
182 118
183 if (router != neigh_node) 119 if (router != neigh_node)
184 update_route(bat_priv, orig_node, neigh_node); 120 _update_route(bat_priv, orig_node, neigh_node);
185 121
186out: 122out:
187 if (router) 123 if (router)
188 neigh_node_free_ref(router); 124 neigh_node_free_ref(router);
189} 125}
190 126
191static int is_bidirectional_neigh(struct orig_node *orig_node,
192 struct orig_node *orig_neigh_node,
193 struct batman_packet *batman_packet,
194 struct hard_iface *if_incoming)
195{
196 struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
197 struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
198 struct hlist_node *node;
199 uint8_t total_count;
200 uint8_t orig_eq_count, neigh_rq_count, tq_own;
201 int tq_asym_penalty, ret = 0;
202
203 /* find corresponding one hop neighbor */
204 rcu_read_lock();
205 hlist_for_each_entry_rcu(tmp_neigh_node, node,
206 &orig_neigh_node->neigh_list, list) {
207
208 if (!compare_eth(tmp_neigh_node->addr, orig_neigh_node->orig))
209 continue;
210
211 if (tmp_neigh_node->if_incoming != if_incoming)
212 continue;
213
214 if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
215 continue;
216
217 neigh_node = tmp_neigh_node;
218 break;
219 }
220 rcu_read_unlock();
221
222 if (!neigh_node)
223 neigh_node = create_neighbor(orig_neigh_node,
224 orig_neigh_node,
225 orig_neigh_node->orig,
226 if_incoming);
227
228 if (!neigh_node)
229 goto out;
230
231 /* if orig_node is direct neighbour update neigh_node last_valid */
232 if (orig_node == orig_neigh_node)
233 neigh_node->last_valid = jiffies;
234
235 orig_node->last_valid = jiffies;
236
237 /* find packet count of corresponding one hop neighbor */
238 spin_lock_bh(&orig_node->ogm_cnt_lock);
239 orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
240 neigh_rq_count = neigh_node->real_packet_count;
241 spin_unlock_bh(&orig_node->ogm_cnt_lock);
242
243 /* pay attention to not get a value bigger than 100 % */
244 total_count = (orig_eq_count > neigh_rq_count ?
245 neigh_rq_count : orig_eq_count);
246
247 /* if we have too few packets (too less data) we set tq_own to zero */
248 /* if we receive too few packets it is not considered bidirectional */
249 if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
250 (neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
251 tq_own = 0;
252 else
253 /* neigh_node->real_packet_count is never zero as we
254 * only purge old information when getting new
255 * information */
256 tq_own = (TQ_MAX_VALUE * total_count) / neigh_rq_count;
257
258 /*
259 * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
260 * affect the nearly-symmetric links only a little, but
261 * punishes asymmetric links more. This will give a value
262 * between 0 and TQ_MAX_VALUE
263 */
264 tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE *
265 (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
266 (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
267 (TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) /
268 (TQ_LOCAL_WINDOW_SIZE *
269 TQ_LOCAL_WINDOW_SIZE *
270 TQ_LOCAL_WINDOW_SIZE);
271
272 batman_packet->tq = ((batman_packet->tq * tq_own * tq_asym_penalty) /
273 (TQ_MAX_VALUE * TQ_MAX_VALUE));
274
275 bat_dbg(DBG_BATMAN, bat_priv,
276 "bidirectional: "
277 "orig = %-15pM neigh = %-15pM => own_bcast = %2i, "
278 "real recv = %2i, local tq: %3i, asym_penalty: %3i, "
279 "total tq: %3i\n",
280 orig_node->orig, orig_neigh_node->orig, total_count,
281 neigh_rq_count, tq_own, tq_asym_penalty, batman_packet->tq);
282
283 /* if link has the minimum required transmission quality
284 * consider it bidirectional */
285 if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
286 ret = 1;
287
288out:
289 if (neigh_node)
290 neigh_node_free_ref(neigh_node);
291 return ret;
292}
293
294/* caller must hold the neigh_list_lock */ 127/* caller must hold the neigh_list_lock */
295void bonding_candidate_del(struct orig_node *orig_node, 128void bonding_candidate_del(struct orig_node *orig_node,
296 struct neigh_node *neigh_node) 129 struct neigh_node *neigh_node)
@@ -308,8 +141,8 @@ out:
308 return; 141 return;
309} 142}
310 143
311static void bonding_candidate_add(struct orig_node *orig_node, 144void bonding_candidate_add(struct orig_node *orig_node,
312 struct neigh_node *neigh_node) 145 struct neigh_node *neigh_node)
313{ 146{
314 struct hlist_node *node; 147 struct hlist_node *node;
315 struct neigh_node *tmp_neigh_node, *router = NULL; 148 struct neigh_node *tmp_neigh_node, *router = NULL;
@@ -379,162 +212,23 @@ out:
379} 212}
380 213
381/* copy primary address for bonding */ 214/* copy primary address for bonding */
382static void bonding_save_primary(const struct orig_node *orig_node, 215void bonding_save_primary(const struct orig_node *orig_node,
383 struct orig_node *orig_neigh_node, 216 struct orig_node *orig_neigh_node,
384 const struct batman_packet *batman_packet) 217 const struct batman_ogm_packet *batman_ogm_packet)
385{ 218{
386 if (!(batman_packet->flags & PRIMARIES_FIRST_HOP)) 219 if (!(batman_ogm_packet->flags & PRIMARIES_FIRST_HOP))
387 return; 220 return;
388 221
389 memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN); 222 memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN);
390} 223}
391 224
392static void update_orig(struct bat_priv *bat_priv, struct orig_node *orig_node,
393 const struct ethhdr *ethhdr,
394 const struct batman_packet *batman_packet,
395 struct hard_iface *if_incoming,
396 const unsigned char *tt_buff, int is_duplicate)
397{
398 struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
399 struct neigh_node *router = NULL;
400 struct orig_node *orig_node_tmp;
401 struct hlist_node *node;
402 uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
403
404 bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
405 "Searching and updating originator entry of received packet\n");
406
407 rcu_read_lock();
408 hlist_for_each_entry_rcu(tmp_neigh_node, node,
409 &orig_node->neigh_list, list) {
410 if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
411 (tmp_neigh_node->if_incoming == if_incoming) &&
412 atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
413 if (neigh_node)
414 neigh_node_free_ref(neigh_node);
415 neigh_node = tmp_neigh_node;
416 continue;
417 }
418
419 if (is_duplicate)
420 continue;
421
422 spin_lock_bh(&tmp_neigh_node->tq_lock);
423 ring_buffer_set(tmp_neigh_node->tq_recv,
424 &tmp_neigh_node->tq_index, 0);
425 tmp_neigh_node->tq_avg =
426 ring_buffer_avg(tmp_neigh_node->tq_recv);
427 spin_unlock_bh(&tmp_neigh_node->tq_lock);
428 }
429
430 if (!neigh_node) {
431 struct orig_node *orig_tmp;
432
433 orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
434 if (!orig_tmp)
435 goto unlock;
436
437 neigh_node = create_neighbor(orig_node, orig_tmp,
438 ethhdr->h_source, if_incoming);
439
440 orig_node_free_ref(orig_tmp);
441 if (!neigh_node)
442 goto unlock;
443 } else
444 bat_dbg(DBG_BATMAN, bat_priv,
445 "Updating existing last-hop neighbor of originator\n");
446
447 rcu_read_unlock();
448
449 orig_node->flags = batman_packet->flags;
450 neigh_node->last_valid = jiffies;
451
452 spin_lock_bh(&neigh_node->tq_lock);
453 ring_buffer_set(neigh_node->tq_recv,
454 &neigh_node->tq_index,
455 batman_packet->tq);
456 neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
457 spin_unlock_bh(&neigh_node->tq_lock);
458
459 if (!is_duplicate) {
460 orig_node->last_ttl = batman_packet->ttl;
461 neigh_node->last_ttl = batman_packet->ttl;
462 }
463
464 bonding_candidate_add(orig_node, neigh_node);
465
466 /* if this neighbor already is our next hop there is nothing
467 * to change */
468 router = orig_node_get_router(orig_node);
469 if (router == neigh_node)
470 goto update_tt;
471
472 /* if this neighbor does not offer a better TQ we won't consider it */
473 if (router && (router->tq_avg > neigh_node->tq_avg))
474 goto update_tt;
475
476 /* if the TQ is the same and the link not more symetric we
477 * won't consider it either */
478 if (router && (neigh_node->tq_avg == router->tq_avg)) {
479 orig_node_tmp = router->orig_node;
480 spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
481 bcast_own_sum_orig =
482 orig_node_tmp->bcast_own_sum[if_incoming->if_num];
483 spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
484
485 orig_node_tmp = neigh_node->orig_node;
486 spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
487 bcast_own_sum_neigh =
488 orig_node_tmp->bcast_own_sum[if_incoming->if_num];
489 spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
490
491 if (bcast_own_sum_orig >= bcast_own_sum_neigh)
492 goto update_tt;
493 }
494
495 update_routes(bat_priv, orig_node, neigh_node);
496
497update_tt:
498 /* I have to check for transtable changes only if the OGM has been
499 * sent through a primary interface */
500 if (((batman_packet->orig != ethhdr->h_source) &&
501 (batman_packet->ttl > 2)) ||
502 (batman_packet->flags & PRIMARIES_FIRST_HOP))
503 update_transtable(bat_priv, orig_node, tt_buff,
504 batman_packet->tt_num_changes,
505 batman_packet->ttvn,
506 batman_packet->tt_crc);
507
508 if (orig_node->gw_flags != batman_packet->gw_flags)
509 gw_node_update(bat_priv, orig_node, batman_packet->gw_flags);
510
511 orig_node->gw_flags = batman_packet->gw_flags;
512
513 /* restart gateway selection if fast or late switching was enabled */
514 if ((orig_node->gw_flags) &&
515 (atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) &&
516 (atomic_read(&bat_priv->gw_sel_class) > 2))
517 gw_check_election(bat_priv, orig_node);
518
519 goto out;
520
521unlock:
522 rcu_read_unlock();
523out:
524 if (neigh_node)
525 neigh_node_free_ref(neigh_node);
526 if (router)
527 neigh_node_free_ref(router);
528}
529
530/* checks whether the host restarted and is in the protection time. 225/* checks whether the host restarted and is in the protection time.
531 * returns: 226 * returns:
532 * 0 if the packet is to be accepted 227 * 0 if the packet is to be accepted
533 * 1 if the packet is to be ignored. 228 * 1 if the packet is to be ignored.
534 */ 229 */
535static int window_protected(struct bat_priv *bat_priv, 230int window_protected(struct bat_priv *bat_priv, int32_t seq_num_diff,
536 int32_t seq_num_diff, 231 unsigned long *last_reset)
537 unsigned long *last_reset)
538{ 232{
539 if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE) 233 if ((seq_num_diff <= -TQ_LOCAL_WINDOW_SIZE)
540 || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) { 234 || (seq_num_diff >= EXPECTED_SEQNO_RANGE)) {
@@ -552,330 +246,12 @@ static int window_protected(struct bat_priv *bat_priv,
552 return 0; 246 return 0;
553} 247}
554 248
555/* processes a batman packet for all interfaces, adjusts the sequence number and 249int recv_bat_ogm_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
556 * finds out whether it is a duplicate.
557 * returns:
558 * 1 the packet is a duplicate
559 * 0 the packet has not yet been received
560 * -1 the packet is old and has been received while the seqno window
561 * was protected. Caller should drop it.
562 */
563static int count_real_packets(const struct ethhdr *ethhdr,
564 const struct batman_packet *batman_packet,
565 const struct hard_iface *if_incoming)
566{
567 struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
568 struct orig_node *orig_node;
569 struct neigh_node *tmp_neigh_node;
570 struct hlist_node *node;
571 int is_duplicate = 0;
572 int32_t seq_diff;
573 int need_update = 0;
574 int set_mark, ret = -1;
575
576 orig_node = get_orig_node(bat_priv, batman_packet->orig);
577 if (!orig_node)
578 return 0;
579
580 spin_lock_bh(&orig_node->ogm_cnt_lock);
581 seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
582
583 /* signalize caller that the packet is to be dropped. */
584 if (window_protected(bat_priv, seq_diff,
585 &orig_node->batman_seqno_reset))
586 goto out;
587
588 rcu_read_lock();
589 hlist_for_each_entry_rcu(tmp_neigh_node, node,
590 &orig_node->neigh_list, list) {
591
592 is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
593 orig_node->last_real_seqno,
594 batman_packet->seqno);
595
596 if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
597 (tmp_neigh_node->if_incoming == if_incoming))
598 set_mark = 1;
599 else
600 set_mark = 0;
601
602 /* if the window moved, set the update flag. */
603 need_update |= bit_get_packet(bat_priv,
604 tmp_neigh_node->real_bits,
605 seq_diff, set_mark);
606
607 tmp_neigh_node->real_packet_count =
608 bit_packet_count(tmp_neigh_node->real_bits);
609 }
610 rcu_read_unlock();
611
612 if (need_update) {
613 bat_dbg(DBG_BATMAN, bat_priv,
614 "updating last_seqno: old %d, new %d\n",
615 orig_node->last_real_seqno, batman_packet->seqno);
616 orig_node->last_real_seqno = batman_packet->seqno;
617 }
618
619 ret = is_duplicate;
620
621out:
622 spin_unlock_bh(&orig_node->ogm_cnt_lock);
623 orig_node_free_ref(orig_node);
624 return ret;
625}
626
627void receive_bat_packet(const struct ethhdr *ethhdr,
628 struct batman_packet *batman_packet,
629 const unsigned char *tt_buff,
630 struct hard_iface *if_incoming)
631{
632 struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
633 struct hard_iface *hard_iface;
634 struct orig_node *orig_neigh_node, *orig_node;
635 struct neigh_node *router = NULL, *router_router = NULL;
636 struct neigh_node *orig_neigh_router = NULL;
637 int has_directlink_flag;
638 int is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
639 int is_broadcast = 0, is_bidirectional, is_single_hop_neigh;
640 int is_duplicate;
641 uint32_t if_incoming_seqno;
642
643 /* Silently drop when the batman packet is actually not a
644 * correct packet.
645 *
646 * This might happen if a packet is padded (e.g. Ethernet has a
647 * minimum frame length of 64 byte) and the aggregation interprets
648 * it as an additional length.
649 *
650 * TODO: A more sane solution would be to have a bit in the
651 * batman_packet to detect whether the packet is the last
652 * packet in an aggregation. Here we expect that the padding
653 * is always zero (or not 0x01)
654 */
655 if (batman_packet->packet_type != BAT_PACKET)
656 return;
657
658 /* could be changed by schedule_own_packet() */
659 if_incoming_seqno = atomic_read(&if_incoming->seqno);
660
661 has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
662
663 is_single_hop_neigh = (compare_eth(ethhdr->h_source,
664 batman_packet->orig) ? 1 : 0);
665
666 bat_dbg(DBG_BATMAN, bat_priv,
667 "Received BATMAN packet via NB: %pM, IF: %s [%pM] "
668 "(from OG: %pM, via prev OG: %pM, seqno %d, ttvn %u, "
669 "crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
670 ethhdr->h_source, if_incoming->net_dev->name,
671 if_incoming->net_dev->dev_addr, batman_packet->orig,
672 batman_packet->prev_sender, batman_packet->seqno,
673 batman_packet->ttvn, batman_packet->tt_crc,
674 batman_packet->tt_num_changes, batman_packet->tq,
675 batman_packet->ttl, batman_packet->version,
676 has_directlink_flag);
677
678 rcu_read_lock();
679 list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
680 if (hard_iface->if_status != IF_ACTIVE)
681 continue;
682
683 if (hard_iface->soft_iface != if_incoming->soft_iface)
684 continue;
685
686 if (compare_eth(ethhdr->h_source,
687 hard_iface->net_dev->dev_addr))
688 is_my_addr = 1;
689
690 if (compare_eth(batman_packet->orig,
691 hard_iface->net_dev->dev_addr))
692 is_my_orig = 1;
693
694 if (compare_eth(batman_packet->prev_sender,
695 hard_iface->net_dev->dev_addr))
696 is_my_oldorig = 1;
697
698 if (is_broadcast_ether_addr(ethhdr->h_source))
699 is_broadcast = 1;
700 }
701 rcu_read_unlock();
702
703 if (batman_packet->version != COMPAT_VERSION) {
704 bat_dbg(DBG_BATMAN, bat_priv,
705 "Drop packet: incompatible batman version (%i)\n",
706 batman_packet->version);
707 return;
708 }
709
710 if (is_my_addr) {
711 bat_dbg(DBG_BATMAN, bat_priv,
712 "Drop packet: received my own broadcast (sender: %pM"
713 ")\n",
714 ethhdr->h_source);
715 return;
716 }
717
718 if (is_broadcast) {
719 bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
720 "ignoring all packets with broadcast source addr (sender: %pM"
721 ")\n", ethhdr->h_source);
722 return;
723 }
724
725 if (is_my_orig) {
726 unsigned long *word;
727 int offset;
728
729 orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
730 if (!orig_neigh_node)
731 return;
732
733 /* neighbor has to indicate direct link and it has to
734 * come via the corresponding interface */
735 /* save packet seqno for bidirectional check */
736 if (has_directlink_flag &&
737 compare_eth(if_incoming->net_dev->dev_addr,
738 batman_packet->orig)) {
739 offset = if_incoming->if_num * NUM_WORDS;
740
741 spin_lock_bh(&orig_neigh_node->ogm_cnt_lock);
742 word = &(orig_neigh_node->bcast_own[offset]);
743 bit_mark(word,
744 if_incoming_seqno - batman_packet->seqno - 2);
745 orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
746 bit_packet_count(word);
747 spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
748 }
749
750 bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
751 "originator packet from myself (via neighbor)\n");
752 orig_node_free_ref(orig_neigh_node);
753 return;
754 }
755
756 if (is_my_oldorig) {
757 bat_dbg(DBG_BATMAN, bat_priv,
758 "Drop packet: ignoring all rebroadcast echos (sender: "
759 "%pM)\n", ethhdr->h_source);
760 return;
761 }
762
763 orig_node = get_orig_node(bat_priv, batman_packet->orig);
764 if (!orig_node)
765 return;
766
767 is_duplicate = count_real_packets(ethhdr, batman_packet, if_incoming);
768
769 if (is_duplicate == -1) {
770 bat_dbg(DBG_BATMAN, bat_priv,
771 "Drop packet: packet within seqno protection time "
772 "(sender: %pM)\n", ethhdr->h_source);
773 goto out;
774 }
775
776 if (batman_packet->tq == 0) {
777 bat_dbg(DBG_BATMAN, bat_priv,
778 "Drop packet: originator packet with tq equal 0\n");
779 goto out;
780 }
781
782 router = orig_node_get_router(orig_node);
783 if (router)
784 router_router = orig_node_get_router(router->orig_node);
785
786 /* avoid temporary routing loops */
787 if (router && router_router &&
788 (compare_eth(router->addr, batman_packet->prev_sender)) &&
789 !(compare_eth(batman_packet->orig, batman_packet->prev_sender)) &&
790 (compare_eth(router->addr, router_router->addr))) {
791 bat_dbg(DBG_BATMAN, bat_priv,
792 "Drop packet: ignoring all rebroadcast packets that "
793 "may make me loop (sender: %pM)\n", ethhdr->h_source);
794 goto out;
795 }
796
797 /* if sender is a direct neighbor the sender mac equals
798 * originator mac */
799 orig_neigh_node = (is_single_hop_neigh ?
800 orig_node :
801 get_orig_node(bat_priv, ethhdr->h_source));
802 if (!orig_neigh_node)
803 goto out;
804
805 orig_neigh_router = orig_node_get_router(orig_neigh_node);
806
807 /* drop packet if sender is not a direct neighbor and if we
808 * don't route towards it */
809 if (!is_single_hop_neigh && (!orig_neigh_router)) {
810 bat_dbg(DBG_BATMAN, bat_priv,
811 "Drop packet: OGM via unknown neighbor!\n");
812 goto out_neigh;
813 }
814
815 is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node,
816 batman_packet, if_incoming);
817
818 bonding_save_primary(orig_node, orig_neigh_node, batman_packet);
819
820 /* update ranking if it is not a duplicate or has the same
821 * seqno and similar ttl as the non-duplicate */
822 if (is_bidirectional &&
823 (!is_duplicate ||
824 ((orig_node->last_real_seqno == batman_packet->seqno) &&
825 (orig_node->last_ttl - 3 <= batman_packet->ttl))))
826 update_orig(bat_priv, orig_node, ethhdr, batman_packet,
827 if_incoming, tt_buff, is_duplicate);
828
829 /* is single hop (direct) neighbor */
830 if (is_single_hop_neigh) {
831
832 /* mark direct link on incoming interface */
833 schedule_forward_packet(orig_node, ethhdr, batman_packet,
834 1, if_incoming);
835
836 bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
837 "rebroadcast neighbor packet with direct link flag\n");
838 goto out_neigh;
839 }
840
841 /* multihop originator */
842 if (!is_bidirectional) {
843 bat_dbg(DBG_BATMAN, bat_priv,
844 "Drop packet: not received via bidirectional link\n");
845 goto out_neigh;
846 }
847
848 if (is_duplicate) {
849 bat_dbg(DBG_BATMAN, bat_priv,
850 "Drop packet: duplicate packet received\n");
851 goto out_neigh;
852 }
853
854 bat_dbg(DBG_BATMAN, bat_priv,
855 "Forwarding packet: rebroadcast originator packet\n");
856 schedule_forward_packet(orig_node, ethhdr, batman_packet,
857 0, if_incoming);
858
859out_neigh:
860 if ((orig_neigh_node) && (!is_single_hop_neigh))
861 orig_node_free_ref(orig_neigh_node);
862out:
863 if (router)
864 neigh_node_free_ref(router);
865 if (router_router)
866 neigh_node_free_ref(router_router);
867 if (orig_neigh_router)
868 neigh_node_free_ref(orig_neigh_router);
869
870 orig_node_free_ref(orig_node);
871}
872
873int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
874{ 250{
875 struct ethhdr *ethhdr; 251 struct ethhdr *ethhdr;
876 252
877 /* drop packet if it has not necessary minimum size */ 253 /* drop packet if it has not necessary minimum size */
878 if (unlikely(!pskb_may_pull(skb, sizeof(struct batman_packet)))) 254 if (unlikely(!pskb_may_pull(skb, BATMAN_OGM_LEN)))
879 return NET_RX_DROP; 255 return NET_RX_DROP;
880 256
881 ethhdr = (struct ethhdr *)skb_mac_header(skb); 257 ethhdr = (struct ethhdr *)skb_mac_header(skb);
@@ -898,10 +274,7 @@ int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
898 274
899 ethhdr = (struct ethhdr *)skb_mac_header(skb); 275 ethhdr = (struct ethhdr *)skb_mac_header(skb);
900 276
901 receive_aggr_bat_packet(ethhdr, 277 bat_ogm_receive(ethhdr, skb->data, skb_headlen(skb), hard_iface);
902 skb->data,
903 skb_headlen(skb),
904 hard_iface);
905 278
906 kfree_skb(skb); 279 kfree_skb(skb);
907 return NET_RX_SUCCESS; 280 return NET_RX_SUCCESS;
@@ -1243,7 +616,7 @@ int recv_tt_query(struct sk_buff *skb, struct hard_iface *recv_if)
1243 } 616 }
1244 break; 617 break;
1245 case TT_RESPONSE: 618 case TT_RESPONSE:
1246 /* packet needs to be linearised to access the TT changes */ 619 /* packet needs to be linearized to access the TT changes */
1247 if (skb_linearize(skb) < 0) 620 if (skb_linearize(skb) < 0)
1248 goto out; 621 goto out;
1249 622
@@ -1300,7 +673,7 @@ int recv_roam_adv(struct sk_buff *skb, struct hard_iface *recv_if)
1300 roam_adv_packet->client); 673 roam_adv_packet->client);
1301 674
1302 tt_global_add(bat_priv, orig_node, roam_adv_packet->client, 675 tt_global_add(bat_priv, orig_node, roam_adv_packet->client,
1303 atomic_read(&orig_node->last_ttvn) + 1, true); 676 atomic_read(&orig_node->last_ttvn) + 1, true, false);
1304 677
1305 /* Roaming phase starts: I have new information but the ttvn has not 678 /* Roaming phase starts: I have new information but the ttvn has not
1306 * been incremented yet. This flag will make me check all the incoming 679 * been incremented yet. This flag will make me check all the incoming
@@ -1536,7 +909,7 @@ static int check_unicast_ttvn(struct bat_priv *bat_priv,
1536 909
1537 ethhdr = (struct ethhdr *)(skb->data + 910 ethhdr = (struct ethhdr *)(skb->data +
1538 sizeof(struct unicast_packet)); 911 sizeof(struct unicast_packet));
1539 orig_node = transtable_search(bat_priv, ethhdr->h_dest); 912 orig_node = transtable_search(bat_priv, NULL, ethhdr->h_dest);
1540 913
1541 if (!orig_node) { 914 if (!orig_node) {
1542 if (!is_my_client(bat_priv, ethhdr->h_dest)) 915 if (!is_my_client(bat_priv, ethhdr->h_dest))
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-19 09:36:44 -0400