1 /* Copyright (C) 2007-2012 B.A.T.M.A.N. contributors:
3 * Marek Lindner, Simon Wunderlich
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.
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.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 #include "translation-table.h"
22 #include "ring_buffer.h"
23 #include "originator.h"
25 #include "gateway_common.h"
26 #include "gateway_client.h"
27 #include "hard-interface.h"
31 static struct batadv_neigh_node
*
32 batadv_iv_ogm_neigh_new(struct batadv_hard_iface
*hard_iface
,
33 const uint8_t *neigh_addr
,
34 struct batadv_orig_node
*orig_node
,
35 struct batadv_orig_node
*orig_neigh
, __be32 seqno
)
37 struct batadv_neigh_node
*neigh_node
;
39 neigh_node
= batadv_neigh_node_new(hard_iface
, neigh_addr
,
44 INIT_LIST_HEAD(&neigh_node
->bonding_list
);
46 neigh_node
->orig_node
= orig_neigh
;
47 neigh_node
->if_incoming
= hard_iface
;
49 spin_lock_bh(&orig_node
->neigh_list_lock
);
50 hlist_add_head_rcu(&neigh_node
->list
, &orig_node
->neigh_list
);
51 spin_unlock_bh(&orig_node
->neigh_list_lock
);
57 static int batadv_iv_ogm_iface_enable(struct batadv_hard_iface
*hard_iface
)
59 struct batadv_ogm_packet
*batadv_ogm_packet
;
60 uint32_t random_seqno
;
63 /* randomize initial seqno to avoid collision */
64 get_random_bytes(&random_seqno
, sizeof(random_seqno
));
65 atomic_set(&hard_iface
->seqno
, random_seqno
);
67 hard_iface
->packet_len
= BATADV_OGM_HLEN
;
68 hard_iface
->packet_buff
= kmalloc(hard_iface
->packet_len
, GFP_ATOMIC
);
70 if (!hard_iface
->packet_buff
)
73 batadv_ogm_packet
= (struct batadv_ogm_packet
*)hard_iface
->packet_buff
;
74 batadv_ogm_packet
->header
.packet_type
= BATADV_IV_OGM
;
75 batadv_ogm_packet
->header
.version
= BATADV_COMPAT_VERSION
;
76 batadv_ogm_packet
->header
.ttl
= 2;
77 batadv_ogm_packet
->flags
= BATADV_NO_FLAGS
;
78 batadv_ogm_packet
->tq
= BATADV_TQ_MAX_VALUE
;
79 batadv_ogm_packet
->tt_num_changes
= 0;
80 batadv_ogm_packet
->ttvn
= 0;
88 static void batadv_iv_ogm_iface_disable(struct batadv_hard_iface
*hard_iface
)
90 kfree(hard_iface
->packet_buff
);
91 hard_iface
->packet_buff
= NULL
;
94 static void batadv_iv_ogm_iface_update_mac(struct batadv_hard_iface
*hard_iface
)
96 struct batadv_ogm_packet
*batadv_ogm_packet
;
98 batadv_ogm_packet
= (struct batadv_ogm_packet
*)hard_iface
->packet_buff
;
99 memcpy(batadv_ogm_packet
->orig
,
100 hard_iface
->net_dev
->dev_addr
, ETH_ALEN
);
101 memcpy(batadv_ogm_packet
->prev_sender
,
102 hard_iface
->net_dev
->dev_addr
, ETH_ALEN
);
106 batadv_iv_ogm_primary_iface_set(struct batadv_hard_iface
*hard_iface
)
108 struct batadv_ogm_packet
*batadv_ogm_packet
;
110 batadv_ogm_packet
= (struct batadv_ogm_packet
*)hard_iface
->packet_buff
;
111 batadv_ogm_packet
->flags
= BATADV_PRIMARIES_FIRST_HOP
;
112 batadv_ogm_packet
->header
.ttl
= BATADV_TTL
;
115 /* when do we schedule our own ogm to be sent */
117 batadv_iv_ogm_emit_send_time(const struct batadv_priv
*bat_priv
)
121 msecs
= atomic_read(&bat_priv
->orig_interval
) - BATADV_JITTER
;
122 msecs
+= (random32() % 2 * BATADV_JITTER
);
124 return jiffies
+ msecs_to_jiffies(msecs
);
127 /* when do we schedule a ogm packet to be sent */
128 static unsigned long batadv_iv_ogm_fwd_send_time(void)
130 return jiffies
+ msecs_to_jiffies(random32() % (BATADV_JITTER
/ 2));
133 /* apply hop penalty for a normal link */
134 static uint8_t batadv_hop_penalty(uint8_t tq
,
135 const struct batadv_priv
*bat_priv
)
137 int hop_penalty
= atomic_read(&bat_priv
->hop_penalty
);
140 new_tq
= tq
* (BATADV_TQ_MAX_VALUE
- hop_penalty
);
141 new_tq
/= BATADV_TQ_MAX_VALUE
;
146 /* is there another aggregated packet here? */
147 static int batadv_iv_ogm_aggr_packet(int buff_pos
, int packet_len
,
150 int next_buff_pos
= 0;
152 next_buff_pos
+= buff_pos
+ BATADV_OGM_HLEN
;
153 next_buff_pos
+= batadv_tt_len(tt_num_changes
);
155 return (next_buff_pos
<= packet_len
) &&
156 (next_buff_pos
<= BATADV_MAX_AGGREGATION_BYTES
);
159 /* send a batman ogm to a given interface */
160 static void batadv_iv_ogm_send_to_if(struct batadv_forw_packet
*forw_packet
,
161 struct batadv_hard_iface
*hard_iface
)
163 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
167 struct batadv_ogm_packet
*batadv_ogm_packet
;
170 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
175 batadv_ogm_packet
= (struct batadv_ogm_packet
*)forw_packet
->skb
->data
;
177 /* adjust all flags and log packets */
178 while (batadv_iv_ogm_aggr_packet(buff_pos
, forw_packet
->packet_len
,
179 batadv_ogm_packet
->tt_num_changes
)) {
181 /* we might have aggregated direct link packets with an
182 * ordinary base packet
184 if ((forw_packet
->direct_link_flags
& (1 << packet_num
)) &&
185 (forw_packet
->if_incoming
== hard_iface
))
186 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
188 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
190 fwd_str
= (packet_num
> 0 ? "Forwarding" : (forw_packet
->own
?
193 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
194 "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n",
195 fwd_str
, (packet_num
> 0 ? "aggregated " : ""),
196 batadv_ogm_packet
->orig
,
197 ntohl(batadv_ogm_packet
->seqno
),
198 batadv_ogm_packet
->tq
, batadv_ogm_packet
->header
.ttl
,
199 (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
?
201 batadv_ogm_packet
->ttvn
, hard_iface
->net_dev
->name
,
202 hard_iface
->net_dev
->dev_addr
);
204 buff_pos
+= BATADV_OGM_HLEN
;
205 buff_pos
+= batadv_tt_len(batadv_ogm_packet
->tt_num_changes
);
207 batadv_ogm_packet
= (struct batadv_ogm_packet
*)
208 (forw_packet
->skb
->data
+ buff_pos
);
211 /* create clone because function is called more than once */
212 skb
= skb_clone(forw_packet
->skb
, GFP_ATOMIC
);
214 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_TX
);
215 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_TX_BYTES
,
216 skb
->len
+ ETH_HLEN
);
217 batadv_send_skb_packet(skb
, hard_iface
, batadv_broadcast_addr
);
221 /* send a batman ogm packet */
222 static void batadv_iv_ogm_emit(struct batadv_forw_packet
*forw_packet
)
224 struct batadv_hard_iface
*hard_iface
;
225 struct net_device
*soft_iface
;
226 struct batadv_priv
*bat_priv
;
227 struct batadv_hard_iface
*primary_if
= NULL
;
228 struct batadv_ogm_packet
*batadv_ogm_packet
;
229 unsigned char directlink
;
231 batadv_ogm_packet
= (struct batadv_ogm_packet
*)
232 (forw_packet
->skb
->data
);
233 directlink
= (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
? 1 : 0);
235 if (!forw_packet
->if_incoming
) {
236 pr_err("Error - can't forward packet: incoming iface not specified\n");
240 soft_iface
= forw_packet
->if_incoming
->soft_iface
;
241 bat_priv
= netdev_priv(soft_iface
);
243 if (forw_packet
->if_incoming
->if_status
!= BATADV_IF_ACTIVE
)
246 primary_if
= batadv_primary_if_get_selected(bat_priv
);
250 /* multihomed peer assumed
251 * non-primary OGMs are only broadcasted on their interface
253 if ((directlink
&& (batadv_ogm_packet
->header
.ttl
== 1)) ||
254 (forw_packet
->own
&& (forw_packet
->if_incoming
!= primary_if
))) {
256 /* FIXME: what about aggregated packets ? */
257 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
258 "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n",
259 (forw_packet
->own
? "Sending own" : "Forwarding"),
260 batadv_ogm_packet
->orig
,
261 ntohl(batadv_ogm_packet
->seqno
),
262 batadv_ogm_packet
->header
.ttl
,
263 forw_packet
->if_incoming
->net_dev
->name
,
264 forw_packet
->if_incoming
->net_dev
->dev_addr
);
266 /* skb is only used once and than forw_packet is free'd */
267 batadv_send_skb_packet(forw_packet
->skb
,
268 forw_packet
->if_incoming
,
269 batadv_broadcast_addr
);
270 forw_packet
->skb
= NULL
;
275 /* broadcast on every interface */
277 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
278 if (hard_iface
->soft_iface
!= soft_iface
)
281 batadv_iv_ogm_send_to_if(forw_packet
, hard_iface
);
287 batadv_hardif_free_ref(primary_if
);
290 /* return true if new_packet can be aggregated with forw_packet */
292 batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet
*new_bat_ogm_packet
,
293 struct batadv_priv
*bat_priv
,
294 int packet_len
, unsigned long send_time
,
296 const struct batadv_hard_iface
*if_incoming
,
297 const struct batadv_forw_packet
*forw_packet
)
299 struct batadv_ogm_packet
*batadv_ogm_packet
;
300 int aggregated_bytes
= forw_packet
->packet_len
+ packet_len
;
301 struct batadv_hard_iface
*primary_if
= NULL
;
303 unsigned long aggregation_end_time
;
305 batadv_ogm_packet
= (struct batadv_ogm_packet
*)forw_packet
->skb
->data
;
306 aggregation_end_time
= send_time
;
307 aggregation_end_time
+= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
309 /* we can aggregate the current packet to this aggregated packet
312 * - the send time is within our MAX_AGGREGATION_MS time
313 * - the resulting packet wont be bigger than
314 * MAX_AGGREGATION_BYTES
316 if (time_before(send_time
, forw_packet
->send_time
) &&
317 time_after_eq(aggregation_end_time
, forw_packet
->send_time
) &&
318 (aggregated_bytes
<= BATADV_MAX_AGGREGATION_BYTES
)) {
320 /* check aggregation compatibility
321 * -> direct link packets are broadcasted on
322 * their interface only
323 * -> aggregate packet if the current packet is
324 * a "global" packet as well as the base
327 primary_if
= batadv_primary_if_get_selected(bat_priv
);
331 /* packets without direct link flag and high TTL
332 * are flooded through the net
335 (!(batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
)) &&
336 (batadv_ogm_packet
->header
.ttl
!= 1) &&
338 /* own packets originating non-primary
339 * interfaces leave only that interface
341 ((!forw_packet
->own
) ||
342 (forw_packet
->if_incoming
== primary_if
))) {
347 /* if the incoming packet is sent via this one
348 * interface only - we still can aggregate
351 (new_bat_ogm_packet
->header
.ttl
== 1) &&
352 (forw_packet
->if_incoming
== if_incoming
) &&
354 /* packets from direct neighbors or
355 * own secondary interface packets
356 * (= secondary interface packets in general)
358 (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
||
360 forw_packet
->if_incoming
!= primary_if
))) {
368 batadv_hardif_free_ref(primary_if
);
372 /* create a new aggregated packet and add this packet to it */
373 static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff
,
374 int packet_len
, unsigned long send_time
,
376 struct batadv_hard_iface
*if_incoming
,
379 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
380 struct batadv_forw_packet
*forw_packet_aggr
;
381 unsigned char *skb_buff
;
382 unsigned int skb_size
;
384 if (!atomic_inc_not_zero(&if_incoming
->refcount
))
387 /* own packet should always be scheduled */
389 if (!batadv_atomic_dec_not_zero(&bat_priv
->batman_queue_left
)) {
390 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
391 "batman packet queue full\n");
396 forw_packet_aggr
= kmalloc(sizeof(*forw_packet_aggr
), GFP_ATOMIC
);
397 if (!forw_packet_aggr
) {
399 atomic_inc(&bat_priv
->batman_queue_left
);
403 if ((atomic_read(&bat_priv
->aggregated_ogms
)) &&
404 (packet_len
< BATADV_MAX_AGGREGATION_BYTES
))
405 skb_size
= BATADV_MAX_AGGREGATION_BYTES
+ ETH_HLEN
;
407 skb_size
= packet_len
+ ETH_HLEN
;
409 forw_packet_aggr
->skb
= dev_alloc_skb(skb_size
);
410 if (!forw_packet_aggr
->skb
) {
412 atomic_inc(&bat_priv
->batman_queue_left
);
413 kfree(forw_packet_aggr
);
416 skb_reserve(forw_packet_aggr
->skb
, ETH_HLEN
);
418 INIT_HLIST_NODE(&forw_packet_aggr
->list
);
420 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
421 forw_packet_aggr
->packet_len
= packet_len
;
422 memcpy(skb_buff
, packet_buff
, packet_len
);
424 forw_packet_aggr
->own
= own_packet
;
425 forw_packet_aggr
->if_incoming
= if_incoming
;
426 forw_packet_aggr
->num_packets
= 0;
427 forw_packet_aggr
->direct_link_flags
= BATADV_NO_FLAGS
;
428 forw_packet_aggr
->send_time
= send_time
;
430 /* save packet direct link flag status */
432 forw_packet_aggr
->direct_link_flags
|= 1;
434 /* add new packet to packet list */
435 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
436 hlist_add_head(&forw_packet_aggr
->list
, &bat_priv
->forw_bat_list
);
437 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
439 /* start timer for this packet */
440 INIT_DELAYED_WORK(&forw_packet_aggr
->delayed_work
,
441 batadv_send_outstanding_bat_ogm_packet
);
442 queue_delayed_work(batadv_event_workqueue
,
443 &forw_packet_aggr
->delayed_work
,
444 send_time
- jiffies
);
448 batadv_hardif_free_ref(if_incoming
);
451 /* aggregate a new packet into the existing ogm packet */
452 static void batadv_iv_ogm_aggregate(struct batadv_forw_packet
*forw_packet_aggr
,
453 const unsigned char *packet_buff
,
454 int packet_len
, bool direct_link
)
456 unsigned char *skb_buff
;
458 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
459 memcpy(skb_buff
, packet_buff
, packet_len
);
460 forw_packet_aggr
->packet_len
+= packet_len
;
461 forw_packet_aggr
->num_packets
++;
463 /* save packet direct link flag status */
465 forw_packet_aggr
->direct_link_flags
|=
466 (1 << forw_packet_aggr
->num_packets
);
469 static void batadv_iv_ogm_queue_add(struct batadv_priv
*bat_priv
,
470 unsigned char *packet_buff
,
472 struct batadv_hard_iface
*if_incoming
,
473 int own_packet
, unsigned long send_time
)
475 /* _aggr -> pointer to the packet we want to aggregate with
476 * _pos -> pointer to the position in the queue
478 struct batadv_forw_packet
*forw_packet_aggr
= NULL
;
479 struct batadv_forw_packet
*forw_packet_pos
= NULL
;
480 struct hlist_node
*tmp_node
;
481 struct batadv_ogm_packet
*batadv_ogm_packet
;
483 unsigned long max_aggregation_jiffies
;
485 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_buff
;
486 direct_link
= batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
? 1 : 0;
487 max_aggregation_jiffies
= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
489 /* find position for the packet in the forward queue */
490 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
491 /* own packets are not to be aggregated */
492 if ((atomic_read(&bat_priv
->aggregated_ogms
)) && (!own_packet
)) {
493 hlist_for_each_entry(forw_packet_pos
, tmp_node
,
494 &bat_priv
->forw_bat_list
, list
) {
495 if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet
,
496 bat_priv
, packet_len
,
497 send_time
, direct_link
,
500 forw_packet_aggr
= forw_packet_pos
;
506 /* nothing to aggregate with - either aggregation disabled or no
507 * suitable aggregation packet found
509 if (!forw_packet_aggr
) {
510 /* the following section can run without the lock */
511 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
513 /* if we could not aggregate this packet with one of the others
514 * we hold it back for a while, so that it might be aggregated
517 if (!own_packet
&& atomic_read(&bat_priv
->aggregated_ogms
))
518 send_time
+= max_aggregation_jiffies
;
520 batadv_iv_ogm_aggregate_new(packet_buff
, packet_len
,
521 send_time
, direct_link
,
522 if_incoming
, own_packet
);
524 batadv_iv_ogm_aggregate(forw_packet_aggr
, packet_buff
,
525 packet_len
, direct_link
);
526 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
530 static void batadv_iv_ogm_forward(struct batadv_orig_node
*orig_node
,
531 const struct ethhdr
*ethhdr
,
532 struct batadv_ogm_packet
*batadv_ogm_packet
,
533 bool is_single_hop_neigh
,
534 bool is_from_best_next_hop
,
535 struct batadv_hard_iface
*if_incoming
)
537 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
538 uint8_t tt_num_changes
;
540 if (batadv_ogm_packet
->header
.ttl
<= 1) {
541 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
, "ttl exceeded\n");
545 if (!is_from_best_next_hop
) {
546 /* Mark the forwarded packet when it is not coming from our
547 * best next hop. We still need to forward the packet for our
548 * neighbor link quality detection to work in case the packet
549 * originated from a single hop neighbor. Otherwise we can
550 * simply drop the ogm.
552 if (is_single_hop_neigh
)
553 batadv_ogm_packet
->flags
|= BATADV_NOT_BEST_NEXT_HOP
;
558 tt_num_changes
= batadv_ogm_packet
->tt_num_changes
;
560 batadv_ogm_packet
->header
.ttl
--;
561 memcpy(batadv_ogm_packet
->prev_sender
, ethhdr
->h_source
, ETH_ALEN
);
563 /* apply hop penalty */
564 batadv_ogm_packet
->tq
= batadv_hop_penalty(batadv_ogm_packet
->tq
,
567 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
568 "Forwarding packet: tq: %i, ttl: %i\n",
569 batadv_ogm_packet
->tq
, batadv_ogm_packet
->header
.ttl
);
571 /* switch of primaries first hop flag when forwarding */
572 batadv_ogm_packet
->flags
&= ~BATADV_PRIMARIES_FIRST_HOP
;
573 if (is_single_hop_neigh
)
574 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
576 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
578 batadv_iv_ogm_queue_add(bat_priv
, (unsigned char *)batadv_ogm_packet
,
579 BATADV_OGM_HLEN
+ batadv_tt_len(tt_num_changes
),
580 if_incoming
, 0, batadv_iv_ogm_fwd_send_time());
583 static void batadv_iv_ogm_schedule(struct batadv_hard_iface
*hard_iface
)
585 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
586 struct batadv_ogm_packet
*batadv_ogm_packet
;
587 struct batadv_hard_iface
*primary_if
;
588 int vis_server
, tt_num_changes
= 0;
590 vis_server
= atomic_read(&bat_priv
->vis_mode
);
591 primary_if
= batadv_primary_if_get_selected(bat_priv
);
593 if (hard_iface
== primary_if
)
594 tt_num_changes
= batadv_tt_append_diff(bat_priv
,
595 &hard_iface
->packet_buff
,
596 &hard_iface
->packet_len
,
599 batadv_ogm_packet
= (struct batadv_ogm_packet
*)hard_iface
->packet_buff
;
601 /* change sequence number to network order */
602 batadv_ogm_packet
->seqno
=
603 htonl((uint32_t)atomic_read(&hard_iface
->seqno
));
604 atomic_inc(&hard_iface
->seqno
);
606 batadv_ogm_packet
->ttvn
= atomic_read(&bat_priv
->ttvn
);
607 batadv_ogm_packet
->tt_crc
= htons(bat_priv
->tt_crc
);
608 if (tt_num_changes
>= 0)
609 batadv_ogm_packet
->tt_num_changes
= tt_num_changes
;
611 if (vis_server
== BATADV_VIS_TYPE_SERVER_SYNC
)
612 batadv_ogm_packet
->flags
|= BATADV_VIS_SERVER
;
614 batadv_ogm_packet
->flags
&= ~BATADV_VIS_SERVER
;
616 if ((hard_iface
== primary_if
) &&
617 (atomic_read(&bat_priv
->gw_mode
) == BATADV_GW_MODE_SERVER
))
618 batadv_ogm_packet
->gw_flags
=
619 (uint8_t)atomic_read(&bat_priv
->gw_bandwidth
);
621 batadv_ogm_packet
->gw_flags
= BATADV_NO_FLAGS
;
623 batadv_slide_own_bcast_window(hard_iface
);
624 batadv_iv_ogm_queue_add(bat_priv
, hard_iface
->packet_buff
,
625 hard_iface
->packet_len
, hard_iface
, 1,
626 batadv_iv_ogm_emit_send_time(bat_priv
));
629 batadv_hardif_free_ref(primary_if
);
633 batadv_iv_ogm_orig_update(struct batadv_priv
*bat_priv
,
634 struct batadv_orig_node
*orig_node
,
635 const struct ethhdr
*ethhdr
,
636 const struct batadv_ogm_packet
*batadv_ogm_packet
,
637 struct batadv_hard_iface
*if_incoming
,
638 const unsigned char *tt_buff
,
641 struct batadv_neigh_node
*neigh_node
= NULL
, *tmp_neigh_node
= NULL
;
642 struct batadv_neigh_node
*router
= NULL
;
643 struct batadv_orig_node
*orig_node_tmp
;
644 struct hlist_node
*node
;
646 uint8_t sum_orig
, sum_neigh
;
649 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
650 "update_originator(): Searching and updating originator entry of received packet\n");
653 hlist_for_each_entry_rcu(tmp_neigh_node
, node
,
654 &orig_node
->neigh_list
, list
) {
655 neigh_addr
= tmp_neigh_node
->addr
;
656 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
657 tmp_neigh_node
->if_incoming
== if_incoming
&&
658 atomic_inc_not_zero(&tmp_neigh_node
->refcount
)) {
660 batadv_neigh_node_free_ref(neigh_node
);
661 neigh_node
= tmp_neigh_node
;
668 spin_lock_bh(&tmp_neigh_node
->lq_update_lock
);
669 batadv_ring_buffer_set(tmp_neigh_node
->tq_recv
,
670 &tmp_neigh_node
->tq_index
, 0);
671 tmp_neigh_node
->tq_avg
=
672 batadv_ring_buffer_avg(tmp_neigh_node
->tq_recv
);
673 spin_unlock_bh(&tmp_neigh_node
->lq_update_lock
);
677 struct batadv_orig_node
*orig_tmp
;
679 orig_tmp
= batadv_get_orig_node(bat_priv
, ethhdr
->h_source
);
683 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
686 batadv_ogm_packet
->seqno
);
688 batadv_orig_node_free_ref(orig_tmp
);
692 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
693 "Updating existing last-hop neighbor of originator\n");
697 orig_node
->flags
= batadv_ogm_packet
->flags
;
698 neigh_node
->last_seen
= jiffies
;
700 spin_lock_bh(&neigh_node
->lq_update_lock
);
701 batadv_ring_buffer_set(neigh_node
->tq_recv
,
702 &neigh_node
->tq_index
,
703 batadv_ogm_packet
->tq
);
704 neigh_node
->tq_avg
= batadv_ring_buffer_avg(neigh_node
->tq_recv
);
705 spin_unlock_bh(&neigh_node
->lq_update_lock
);
708 orig_node
->last_ttl
= batadv_ogm_packet
->header
.ttl
;
709 neigh_node
->last_ttl
= batadv_ogm_packet
->header
.ttl
;
712 batadv_bonding_candidate_add(orig_node
, neigh_node
);
714 /* if this neighbor already is our next hop there is nothing
717 router
= batadv_orig_node_get_router(orig_node
);
718 if (router
== neigh_node
)
721 /* if this neighbor does not offer a better TQ we won't consider it */
722 if (router
&& (router
->tq_avg
> neigh_node
->tq_avg
))
725 /* if the TQ is the same and the link not more symmetric we
726 * won't consider it either
728 if (router
&& (neigh_node
->tq_avg
== router
->tq_avg
)) {
729 orig_node_tmp
= router
->orig_node
;
730 spin_lock_bh(&orig_node_tmp
->ogm_cnt_lock
);
731 if_num
= router
->if_incoming
->if_num
;
732 sum_orig
= orig_node_tmp
->bcast_own_sum
[if_num
];
733 spin_unlock_bh(&orig_node_tmp
->ogm_cnt_lock
);
735 orig_node_tmp
= neigh_node
->orig_node
;
736 spin_lock_bh(&orig_node_tmp
->ogm_cnt_lock
);
737 if_num
= neigh_node
->if_incoming
->if_num
;
738 sum_neigh
= orig_node_tmp
->bcast_own_sum
[if_num
];
739 spin_unlock_bh(&orig_node_tmp
->ogm_cnt_lock
);
741 if (sum_orig
>= sum_neigh
)
745 batadv_update_route(bat_priv
, orig_node
, neigh_node
);
748 /* I have to check for transtable changes only if the OGM has been
749 * sent through a primary interface
751 if (((batadv_ogm_packet
->orig
!= ethhdr
->h_source
) &&
752 (batadv_ogm_packet
->header
.ttl
> 2)) ||
753 (batadv_ogm_packet
->flags
& BATADV_PRIMARIES_FIRST_HOP
))
754 batadv_tt_update_orig(bat_priv
, orig_node
, tt_buff
,
755 batadv_ogm_packet
->tt_num_changes
,
756 batadv_ogm_packet
->ttvn
,
757 ntohs(batadv_ogm_packet
->tt_crc
));
759 if (orig_node
->gw_flags
!= batadv_ogm_packet
->gw_flags
)
760 batadv_gw_node_update(bat_priv
, orig_node
,
761 batadv_ogm_packet
->gw_flags
);
763 orig_node
->gw_flags
= batadv_ogm_packet
->gw_flags
;
765 /* restart gateway selection if fast or late switching was enabled */
766 if ((orig_node
->gw_flags
) &&
767 (atomic_read(&bat_priv
->gw_mode
) == BATADV_GW_MODE_CLIENT
) &&
768 (atomic_read(&bat_priv
->gw_sel_class
) > 2))
769 batadv_gw_check_election(bat_priv
, orig_node
);
777 batadv_neigh_node_free_ref(neigh_node
);
779 batadv_neigh_node_free_ref(router
);
782 static int batadv_iv_ogm_calc_tq(struct batadv_orig_node
*orig_node
,
783 struct batadv_orig_node
*orig_neigh_node
,
784 struct batadv_ogm_packet
*batadv_ogm_packet
,
785 struct batadv_hard_iface
*if_incoming
)
787 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
788 struct batadv_neigh_node
*neigh_node
= NULL
, *tmp_neigh_node
;
789 struct hlist_node
*node
;
791 uint8_t orig_eq_count
, neigh_rq_count
, neigh_rq_inv
, tq_own
;
792 unsigned int neigh_rq_inv_cube
, neigh_rq_max_cube
;
793 int tq_asym_penalty
, inv_asym_penalty
, ret
= 0;
794 unsigned int combined_tq
;
796 /* find corresponding one hop neighbor */
798 hlist_for_each_entry_rcu(tmp_neigh_node
, node
,
799 &orig_neigh_node
->neigh_list
, list
) {
801 if (!batadv_compare_eth(tmp_neigh_node
->addr
,
802 orig_neigh_node
->orig
))
805 if (tmp_neigh_node
->if_incoming
!= if_incoming
)
808 if (!atomic_inc_not_zero(&tmp_neigh_node
->refcount
))
811 neigh_node
= tmp_neigh_node
;
817 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
818 orig_neigh_node
->orig
,
821 batadv_ogm_packet
->seqno
);
826 /* if orig_node is direct neighbor update neigh_node last_seen */
827 if (orig_node
== orig_neigh_node
)
828 neigh_node
->last_seen
= jiffies
;
830 orig_node
->last_seen
= jiffies
;
832 /* find packet count of corresponding one hop neighbor */
833 spin_lock_bh(&orig_node
->ogm_cnt_lock
);
834 orig_eq_count
= orig_neigh_node
->bcast_own_sum
[if_incoming
->if_num
];
835 neigh_rq_count
= neigh_node
->real_packet_count
;
836 spin_unlock_bh(&orig_node
->ogm_cnt_lock
);
838 /* pay attention to not get a value bigger than 100 % */
839 total_count
= (orig_eq_count
> neigh_rq_count
?
840 neigh_rq_count
: orig_eq_count
);
842 /* if we have too few packets (too less data) we set tq_own to zero
843 * if we receive too few packets it is not considered bidirectional
845 if (total_count
< BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM
||
846 neigh_rq_count
< BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM
)
849 /* neigh_node->real_packet_count is never zero as we
850 * only purge old information when getting new
853 tq_own
= (BATADV_TQ_MAX_VALUE
* total_count
) / neigh_rq_count
;
855 /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
856 * affect the nearly-symmetric links only a little, but
857 * punishes asymmetric links more. This will give a value
858 * between 0 and TQ_MAX_VALUE
860 neigh_rq_inv
= BATADV_TQ_LOCAL_WINDOW_SIZE
- neigh_rq_count
;
861 neigh_rq_inv_cube
= neigh_rq_inv
* neigh_rq_inv
* neigh_rq_inv
;
862 neigh_rq_max_cube
= BATADV_TQ_LOCAL_WINDOW_SIZE
*
863 BATADV_TQ_LOCAL_WINDOW_SIZE
*
864 BATADV_TQ_LOCAL_WINDOW_SIZE
;
865 inv_asym_penalty
= BATADV_TQ_MAX_VALUE
* neigh_rq_inv_cube
;
866 inv_asym_penalty
/= neigh_rq_max_cube
;
867 tq_asym_penalty
= BATADV_TQ_MAX_VALUE
- inv_asym_penalty
;
869 combined_tq
= batadv_ogm_packet
->tq
* tq_own
* tq_asym_penalty
;
870 combined_tq
/= BATADV_TQ_MAX_VALUE
* BATADV_TQ_MAX_VALUE
;
871 batadv_ogm_packet
->tq
= combined_tq
;
873 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
874 "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n",
875 orig_node
->orig
, orig_neigh_node
->orig
, total_count
,
876 neigh_rq_count
, tq_own
,
877 tq_asym_penalty
, batadv_ogm_packet
->tq
);
879 /* if link has the minimum required transmission quality
880 * consider it bidirectional
882 if (batadv_ogm_packet
->tq
>= BATADV_TQ_TOTAL_BIDRECT_LIMIT
)
887 batadv_neigh_node_free_ref(neigh_node
);
891 /* processes a batman packet for all interfaces, adjusts the sequence number and
892 * finds out whether it is a duplicate.
894 * 1 the packet is a duplicate
895 * 0 the packet has not yet been received
896 * -1 the packet is old and has been received while the seqno window
897 * was protected. Caller should drop it.
900 batadv_iv_ogm_update_seqnos(const struct ethhdr
*ethhdr
,
901 const struct batadv_ogm_packet
*batadv_ogm_packet
,
902 const struct batadv_hard_iface
*if_incoming
)
904 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
905 struct batadv_orig_node
*orig_node
;
906 struct batadv_neigh_node
*tmp_neigh_node
;
907 struct hlist_node
*node
;
908 int is_duplicate
= 0;
911 int set_mark
, ret
= -1;
912 uint32_t seqno
= ntohl(batadv_ogm_packet
->seqno
);
915 orig_node
= batadv_get_orig_node(bat_priv
, batadv_ogm_packet
->orig
);
919 spin_lock_bh(&orig_node
->ogm_cnt_lock
);
920 seq_diff
= seqno
- orig_node
->last_real_seqno
;
922 /* signalize caller that the packet is to be dropped. */
923 if (!hlist_empty(&orig_node
->neigh_list
) &&
924 batadv_window_protected(bat_priv
, seq_diff
,
925 &orig_node
->batman_seqno_reset
))
929 hlist_for_each_entry_rcu(tmp_neigh_node
, node
,
930 &orig_node
->neigh_list
, list
) {
932 is_duplicate
|= batadv_test_bit(tmp_neigh_node
->real_bits
,
933 orig_node
->last_real_seqno
,
936 neigh_addr
= tmp_neigh_node
->addr
;
937 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
938 tmp_neigh_node
->if_incoming
== if_incoming
)
943 /* if the window moved, set the update flag. */
944 need_update
|= batadv_bit_get_packet(bat_priv
,
945 tmp_neigh_node
->real_bits
,
948 tmp_neigh_node
->real_packet_count
=
949 bitmap_weight(tmp_neigh_node
->real_bits
,
950 BATADV_TQ_LOCAL_WINDOW_SIZE
);
955 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
956 "updating last_seqno: old %u, new %u\n",
957 orig_node
->last_real_seqno
, seqno
);
958 orig_node
->last_real_seqno
= seqno
;
964 spin_unlock_bh(&orig_node
->ogm_cnt_lock
);
965 batadv_orig_node_free_ref(orig_node
);
969 static void batadv_iv_ogm_process(const struct ethhdr
*ethhdr
,
970 struct batadv_ogm_packet
*batadv_ogm_packet
,
971 const unsigned char *tt_buff
,
972 struct batadv_hard_iface
*if_incoming
)
974 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
975 struct batadv_hard_iface
*hard_iface
;
976 struct batadv_orig_node
*orig_neigh_node
, *orig_node
;
977 struct batadv_neigh_node
*router
= NULL
, *router_router
= NULL
;
978 struct batadv_neigh_node
*orig_neigh_router
= NULL
;
979 int has_directlink_flag
;
980 int is_my_addr
= 0, is_my_orig
= 0, is_my_oldorig
= 0;
981 int is_broadcast
= 0, is_bidirect
;
982 bool is_single_hop_neigh
= false;
983 bool is_from_best_next_hop
= false;
984 int is_duplicate
, sameseq
, simlar_ttl
;
985 uint32_t if_incoming_seqno
;
986 uint8_t *prev_sender
;
988 /* Silently drop when the batman packet is actually not a
991 * This might happen if a packet is padded (e.g. Ethernet has a
992 * minimum frame length of 64 byte) and the aggregation interprets
993 * it as an additional length.
995 * TODO: A more sane solution would be to have a bit in the
996 * batadv_ogm_packet to detect whether the packet is the last
997 * packet in an aggregation. Here we expect that the padding
998 * is always zero (or not 0x01)
1000 if (batadv_ogm_packet
->header
.packet_type
!= BATADV_IV_OGM
)
1003 /* could be changed by schedule_own_packet() */
1004 if_incoming_seqno
= atomic_read(&if_incoming
->seqno
);
1006 if (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
)
1007 has_directlink_flag
= 1;
1009 has_directlink_flag
= 0;
1011 if (batadv_compare_eth(ethhdr
->h_source
, batadv_ogm_packet
->orig
))
1012 is_single_hop_neigh
= true;
1014 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1015 "Received BATMAN packet via NB: %pM, IF: %s [%pM] (from OG: %pM, via prev OG: %pM, seqno %u, ttvn %u, crc %u, changes %u, td %d, TTL %d, V %d, IDF %d)\n",
1016 ethhdr
->h_source
, if_incoming
->net_dev
->name
,
1017 if_incoming
->net_dev
->dev_addr
, batadv_ogm_packet
->orig
,
1018 batadv_ogm_packet
->prev_sender
,
1019 ntohl(batadv_ogm_packet
->seqno
), batadv_ogm_packet
->ttvn
,
1020 ntohs(batadv_ogm_packet
->tt_crc
),
1021 batadv_ogm_packet
->tt_num_changes
, batadv_ogm_packet
->tq
,
1022 batadv_ogm_packet
->header
.ttl
,
1023 batadv_ogm_packet
->header
.version
, has_directlink_flag
);
1026 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1027 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1030 if (hard_iface
->soft_iface
!= if_incoming
->soft_iface
)
1033 if (batadv_compare_eth(ethhdr
->h_source
,
1034 hard_iface
->net_dev
->dev_addr
))
1037 if (batadv_compare_eth(batadv_ogm_packet
->orig
,
1038 hard_iface
->net_dev
->dev_addr
))
1041 if (batadv_compare_eth(batadv_ogm_packet
->prev_sender
,
1042 hard_iface
->net_dev
->dev_addr
))
1045 if (is_broadcast_ether_addr(ethhdr
->h_source
))
1050 if (batadv_ogm_packet
->header
.version
!= BATADV_COMPAT_VERSION
) {
1051 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1052 "Drop packet: incompatible batman version (%i)\n",
1053 batadv_ogm_packet
->header
.version
);
1058 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1059 "Drop packet: received my own broadcast (sender: %pM)\n",
1065 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1066 "Drop packet: ignoring all packets with broadcast source addr (sender: %pM)\n",
1072 unsigned long *word
;
1078 orig_neigh_node
= batadv_get_orig_node(bat_priv
,
1080 if (!orig_neigh_node
)
1083 /* neighbor has to indicate direct link and it has to
1084 * come via the corresponding interface
1085 * save packet seqno for bidirectional check
1087 if (has_directlink_flag
&&
1088 batadv_compare_eth(if_incoming
->net_dev
->dev_addr
,
1089 batadv_ogm_packet
->orig
)) {
1090 if_num
= if_incoming
->if_num
;
1091 offset
= if_num
* BATADV_NUM_WORDS
;
1093 spin_lock_bh(&orig_neigh_node
->ogm_cnt_lock
);
1094 word
= &(orig_neigh_node
->bcast_own
[offset
]);
1095 bit_pos
= if_incoming_seqno
- 2;
1096 bit_pos
-= ntohl(batadv_ogm_packet
->seqno
);
1097 batadv_set_bit(word
, bit_pos
);
1098 weight
= &orig_neigh_node
->bcast_own_sum
[if_num
];
1099 *weight
= bitmap_weight(word
,
1100 BATADV_TQ_LOCAL_WINDOW_SIZE
);
1101 spin_unlock_bh(&orig_neigh_node
->ogm_cnt_lock
);
1104 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1105 "Drop packet: originator packet from myself (via neighbor)\n");
1106 batadv_orig_node_free_ref(orig_neigh_node
);
1110 if (is_my_oldorig
) {
1111 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1112 "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n",
1117 if (batadv_ogm_packet
->flags
& BATADV_NOT_BEST_NEXT_HOP
) {
1118 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1119 "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n",
1124 orig_node
= batadv_get_orig_node(bat_priv
, batadv_ogm_packet
->orig
);
1128 is_duplicate
= batadv_iv_ogm_update_seqnos(ethhdr
, batadv_ogm_packet
,
1131 if (is_duplicate
== -1) {
1132 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1133 "Drop packet: packet within seqno protection time (sender: %pM)\n",
1138 if (batadv_ogm_packet
->tq
== 0) {
1139 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1140 "Drop packet: originator packet with tq equal 0\n");
1144 router
= batadv_orig_node_get_router(orig_node
);
1146 router_router
= batadv_orig_node_get_router(router
->orig_node
);
1148 if ((router
&& router
->tq_avg
!= 0) &&
1149 (batadv_compare_eth(router
->addr
, ethhdr
->h_source
)))
1150 is_from_best_next_hop
= true;
1152 prev_sender
= batadv_ogm_packet
->prev_sender
;
1153 /* avoid temporary routing loops */
1154 if (router
&& router_router
&&
1155 (batadv_compare_eth(router
->addr
, prev_sender
)) &&
1156 !(batadv_compare_eth(batadv_ogm_packet
->orig
, prev_sender
)) &&
1157 (batadv_compare_eth(router
->addr
, router_router
->addr
))) {
1158 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1159 "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n",
1164 /* if sender is a direct neighbor the sender mac equals
1167 orig_neigh_node
= (is_single_hop_neigh
?
1169 batadv_get_orig_node(bat_priv
, ethhdr
->h_source
));
1170 if (!orig_neigh_node
)
1173 orig_neigh_router
= batadv_orig_node_get_router(orig_neigh_node
);
1175 /* drop packet if sender is not a direct neighbor and if we
1176 * don't route towards it
1178 if (!is_single_hop_neigh
&& (!orig_neigh_router
)) {
1179 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1180 "Drop packet: OGM via unknown neighbor!\n");
1184 is_bidirect
= batadv_iv_ogm_calc_tq(orig_node
, orig_neigh_node
,
1185 batadv_ogm_packet
, if_incoming
);
1187 batadv_bonding_save_primary(orig_node
, orig_neigh_node
,
1190 /* update ranking if it is not a duplicate or has the same
1191 * seqno and similar ttl as the non-duplicate
1193 sameseq
= orig_node
->last_real_seqno
== ntohl(batadv_ogm_packet
->seqno
);
1194 simlar_ttl
= orig_node
->last_ttl
- 3 <= batadv_ogm_packet
->header
.ttl
;
1195 if (is_bidirect
&& (!is_duplicate
|| (sameseq
&& simlar_ttl
)))
1196 batadv_iv_ogm_orig_update(bat_priv
, orig_node
, ethhdr
,
1197 batadv_ogm_packet
, if_incoming
,
1198 tt_buff
, is_duplicate
);
1200 /* is single hop (direct) neighbor */
1201 if (is_single_hop_neigh
) {
1203 /* mark direct link on incoming interface */
1204 batadv_iv_ogm_forward(orig_node
, ethhdr
, batadv_ogm_packet
,
1205 is_single_hop_neigh
,
1206 is_from_best_next_hop
, if_incoming
);
1208 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1209 "Forwarding packet: rebroadcast neighbor packet with direct link flag\n");
1213 /* multihop originator */
1215 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1216 "Drop packet: not received via bidirectional link\n");
1221 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1222 "Drop packet: duplicate packet received\n");
1226 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1227 "Forwarding packet: rebroadcast originator packet\n");
1228 batadv_iv_ogm_forward(orig_node
, ethhdr
, batadv_ogm_packet
,
1229 is_single_hop_neigh
, is_from_best_next_hop
,
1233 if ((orig_neigh_node
) && (!is_single_hop_neigh
))
1234 batadv_orig_node_free_ref(orig_neigh_node
);
1237 batadv_neigh_node_free_ref(router
);
1239 batadv_neigh_node_free_ref(router_router
);
1240 if (orig_neigh_router
)
1241 batadv_neigh_node_free_ref(orig_neigh_router
);
1243 batadv_orig_node_free_ref(orig_node
);
1246 static int batadv_iv_ogm_receive(struct sk_buff
*skb
,
1247 struct batadv_hard_iface
*if_incoming
)
1249 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1250 struct batadv_ogm_packet
*batadv_ogm_packet
;
1251 struct ethhdr
*ethhdr
;
1252 int buff_pos
= 0, packet_len
;
1253 unsigned char *tt_buff
, *packet_buff
;
1256 ret
= batadv_check_management_packet(skb
, if_incoming
, BATADV_OGM_HLEN
);
1260 /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface
1261 * that does not have B.A.T.M.A.N. IV enabled ?
1263 if (bat_priv
->bat_algo_ops
->bat_ogm_emit
!= batadv_iv_ogm_emit
)
1266 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_RX
);
1267 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_RX_BYTES
,
1268 skb
->len
+ ETH_HLEN
);
1270 packet_len
= skb_headlen(skb
);
1271 ethhdr
= (struct ethhdr
*)skb_mac_header(skb
);
1272 packet_buff
= skb
->data
;
1273 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_buff
;
1275 /* unpack the aggregated packets and process them one by one */
1277 tt_buff
= packet_buff
+ buff_pos
+ BATADV_OGM_HLEN
;
1279 batadv_iv_ogm_process(ethhdr
, batadv_ogm_packet
, tt_buff
,
1282 buff_pos
+= BATADV_OGM_HLEN
;
1283 buff_pos
+= batadv_tt_len(batadv_ogm_packet
->tt_num_changes
);
1285 batadv_ogm_packet
= (struct batadv_ogm_packet
*)
1286 (packet_buff
+ buff_pos
);
1287 } while (batadv_iv_ogm_aggr_packet(buff_pos
, packet_len
,
1288 batadv_ogm_packet
->tt_num_changes
));
1291 return NET_RX_SUCCESS
;
1294 static struct batadv_algo_ops batadv_batman_iv __read_mostly
= {
1295 .name
= "BATMAN_IV",
1296 .bat_iface_enable
= batadv_iv_ogm_iface_enable
,
1297 .bat_iface_disable
= batadv_iv_ogm_iface_disable
,
1298 .bat_iface_update_mac
= batadv_iv_ogm_iface_update_mac
,
1299 .bat_primary_iface_set
= batadv_iv_ogm_primary_iface_set
,
1300 .bat_ogm_schedule
= batadv_iv_ogm_schedule
,
1301 .bat_ogm_emit
= batadv_iv_ogm_emit
,
1304 int __init
batadv_iv_init(void)
1308 /* batman originator packet */
1309 ret
= batadv_recv_handler_register(BATADV_IV_OGM
,
1310 batadv_iv_ogm_receive
);
1314 ret
= batadv_algo_register(&batadv_batman_iv
);
1316 goto handler_unregister
;
1321 batadv_recv_handler_unregister(BATADV_IV_OGM
);