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
;
171 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
176 packet_pos
= forw_packet
->skb
->data
;
177 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
179 /* adjust all flags and log packets */
180 while (batadv_iv_ogm_aggr_packet(buff_pos
, forw_packet
->packet_len
,
181 batadv_ogm_packet
->tt_num_changes
)) {
183 /* we might have aggregated direct link packets with an
184 * ordinary base packet
186 if (forw_packet
->direct_link_flags
& BIT(packet_num
) &&
187 forw_packet
->if_incoming
== hard_iface
)
188 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
190 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
192 if (packet_num
> 0 || !forw_packet
->own
)
193 fwd_str
= "Forwarding";
195 fwd_str
= "Sending own";
197 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
198 "%s %spacket (originator %pM, seqno %u, TQ %d, TTL %d, IDF %s, ttvn %d) on interface %s [%pM]\n",
199 fwd_str
, (packet_num
> 0 ? "aggregated " : ""),
200 batadv_ogm_packet
->orig
,
201 ntohl(batadv_ogm_packet
->seqno
),
202 batadv_ogm_packet
->tq
, batadv_ogm_packet
->header
.ttl
,
203 (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
?
205 batadv_ogm_packet
->ttvn
, hard_iface
->net_dev
->name
,
206 hard_iface
->net_dev
->dev_addr
);
208 buff_pos
+= BATADV_OGM_HLEN
;
209 buff_pos
+= batadv_tt_len(batadv_ogm_packet
->tt_num_changes
);
211 packet_pos
= forw_packet
->skb
->data
+ buff_pos
;
212 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
215 /* create clone because function is called more than once */
216 skb
= skb_clone(forw_packet
->skb
, GFP_ATOMIC
);
218 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_TX
);
219 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_TX_BYTES
,
220 skb
->len
+ ETH_HLEN
);
221 batadv_send_skb_packet(skb
, hard_iface
, batadv_broadcast_addr
);
225 /* send a batman ogm packet */
226 static void batadv_iv_ogm_emit(struct batadv_forw_packet
*forw_packet
)
228 struct batadv_hard_iface
*hard_iface
;
229 struct net_device
*soft_iface
;
230 struct batadv_priv
*bat_priv
;
231 struct batadv_hard_iface
*primary_if
= NULL
;
232 struct batadv_ogm_packet
*batadv_ogm_packet
;
233 unsigned char directlink
;
236 packet_pos
= forw_packet
->skb
->data
;
237 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
238 directlink
= (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
? 1 : 0);
240 if (!forw_packet
->if_incoming
) {
241 pr_err("Error - can't forward packet: incoming iface not specified\n");
245 soft_iface
= forw_packet
->if_incoming
->soft_iface
;
246 bat_priv
= netdev_priv(soft_iface
);
248 if (forw_packet
->if_incoming
->if_status
!= BATADV_IF_ACTIVE
)
251 primary_if
= batadv_primary_if_get_selected(bat_priv
);
255 /* multihomed peer assumed
256 * non-primary OGMs are only broadcasted on their interface
258 if ((directlink
&& (batadv_ogm_packet
->header
.ttl
== 1)) ||
259 (forw_packet
->own
&& (forw_packet
->if_incoming
!= primary_if
))) {
261 /* FIXME: what about aggregated packets ? */
262 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
263 "%s packet (originator %pM, seqno %u, TTL %d) on interface %s [%pM]\n",
264 (forw_packet
->own
? "Sending own" : "Forwarding"),
265 batadv_ogm_packet
->orig
,
266 ntohl(batadv_ogm_packet
->seqno
),
267 batadv_ogm_packet
->header
.ttl
,
268 forw_packet
->if_incoming
->net_dev
->name
,
269 forw_packet
->if_incoming
->net_dev
->dev_addr
);
271 /* skb is only used once and than forw_packet is free'd */
272 batadv_send_skb_packet(forw_packet
->skb
,
273 forw_packet
->if_incoming
,
274 batadv_broadcast_addr
);
275 forw_packet
->skb
= NULL
;
280 /* broadcast on every interface */
282 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
283 if (hard_iface
->soft_iface
!= soft_iface
)
286 batadv_iv_ogm_send_to_if(forw_packet
, hard_iface
);
292 batadv_hardif_free_ref(primary_if
);
295 /* return true if new_packet can be aggregated with forw_packet */
297 batadv_iv_ogm_can_aggregate(const struct batadv_ogm_packet
*new_bat_ogm_packet
,
298 struct batadv_priv
*bat_priv
,
299 int packet_len
, unsigned long send_time
,
301 const struct batadv_hard_iface
*if_incoming
,
302 const struct batadv_forw_packet
*forw_packet
)
304 struct batadv_ogm_packet
*batadv_ogm_packet
;
305 int aggregated_bytes
= forw_packet
->packet_len
+ packet_len
;
306 struct batadv_hard_iface
*primary_if
= NULL
;
308 unsigned long aggregation_end_time
;
310 batadv_ogm_packet
= (struct batadv_ogm_packet
*)forw_packet
->skb
->data
;
311 aggregation_end_time
= send_time
;
312 aggregation_end_time
+= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
314 /* we can aggregate the current packet to this aggregated packet
317 * - the send time is within our MAX_AGGREGATION_MS time
318 * - the resulting packet wont be bigger than
319 * MAX_AGGREGATION_BYTES
321 if (time_before(send_time
, forw_packet
->send_time
) &&
322 time_after_eq(aggregation_end_time
, forw_packet
->send_time
) &&
323 (aggregated_bytes
<= BATADV_MAX_AGGREGATION_BYTES
)) {
325 /* check aggregation compatibility
326 * -> direct link packets are broadcasted on
327 * their interface only
328 * -> aggregate packet if the current packet is
329 * a "global" packet as well as the base
332 primary_if
= batadv_primary_if_get_selected(bat_priv
);
336 /* packets without direct link flag and high TTL
337 * are flooded through the net
340 (!(batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
)) &&
341 (batadv_ogm_packet
->header
.ttl
!= 1) &&
343 /* own packets originating non-primary
344 * interfaces leave only that interface
346 ((!forw_packet
->own
) ||
347 (forw_packet
->if_incoming
== primary_if
))) {
352 /* if the incoming packet is sent via this one
353 * interface only - we still can aggregate
356 (new_bat_ogm_packet
->header
.ttl
== 1) &&
357 (forw_packet
->if_incoming
== if_incoming
) &&
359 /* packets from direct neighbors or
360 * own secondary interface packets
361 * (= secondary interface packets in general)
363 (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
||
365 forw_packet
->if_incoming
!= primary_if
))) {
373 batadv_hardif_free_ref(primary_if
);
377 /* create a new aggregated packet and add this packet to it */
378 static void batadv_iv_ogm_aggregate_new(const unsigned char *packet_buff
,
379 int packet_len
, unsigned long send_time
,
381 struct batadv_hard_iface
*if_incoming
,
384 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
385 struct batadv_forw_packet
*forw_packet_aggr
;
386 unsigned char *skb_buff
;
387 unsigned int skb_size
;
389 if (!atomic_inc_not_zero(&if_incoming
->refcount
))
392 /* own packet should always be scheduled */
394 if (!batadv_atomic_dec_not_zero(&bat_priv
->batman_queue_left
)) {
395 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
396 "batman packet queue full\n");
401 forw_packet_aggr
= kmalloc(sizeof(*forw_packet_aggr
), GFP_ATOMIC
);
402 if (!forw_packet_aggr
) {
404 atomic_inc(&bat_priv
->batman_queue_left
);
408 if ((atomic_read(&bat_priv
->aggregated_ogms
)) &&
409 (packet_len
< BATADV_MAX_AGGREGATION_BYTES
))
410 skb_size
= BATADV_MAX_AGGREGATION_BYTES
+ ETH_HLEN
;
412 skb_size
= packet_len
+ ETH_HLEN
;
414 forw_packet_aggr
->skb
= dev_alloc_skb(skb_size
);
415 if (!forw_packet_aggr
->skb
) {
417 atomic_inc(&bat_priv
->batman_queue_left
);
418 kfree(forw_packet_aggr
);
421 skb_reserve(forw_packet_aggr
->skb
, ETH_HLEN
);
423 INIT_HLIST_NODE(&forw_packet_aggr
->list
);
425 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
426 forw_packet_aggr
->packet_len
= packet_len
;
427 memcpy(skb_buff
, packet_buff
, packet_len
);
429 forw_packet_aggr
->own
= own_packet
;
430 forw_packet_aggr
->if_incoming
= if_incoming
;
431 forw_packet_aggr
->num_packets
= 0;
432 forw_packet_aggr
->direct_link_flags
= BATADV_NO_FLAGS
;
433 forw_packet_aggr
->send_time
= send_time
;
435 /* save packet direct link flag status */
437 forw_packet_aggr
->direct_link_flags
|= 1;
439 /* add new packet to packet list */
440 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
441 hlist_add_head(&forw_packet_aggr
->list
, &bat_priv
->forw_bat_list
);
442 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
444 /* start timer for this packet */
445 INIT_DELAYED_WORK(&forw_packet_aggr
->delayed_work
,
446 batadv_send_outstanding_bat_ogm_packet
);
447 queue_delayed_work(batadv_event_workqueue
,
448 &forw_packet_aggr
->delayed_work
,
449 send_time
- jiffies
);
453 batadv_hardif_free_ref(if_incoming
);
456 /* aggregate a new packet into the existing ogm packet */
457 static void batadv_iv_ogm_aggregate(struct batadv_forw_packet
*forw_packet_aggr
,
458 const unsigned char *packet_buff
,
459 int packet_len
, bool direct_link
)
461 unsigned char *skb_buff
;
462 unsigned long new_direct_link_flag
;
464 skb_buff
= skb_put(forw_packet_aggr
->skb
, packet_len
);
465 memcpy(skb_buff
, packet_buff
, packet_len
);
466 forw_packet_aggr
->packet_len
+= packet_len
;
467 forw_packet_aggr
->num_packets
++;
469 /* save packet direct link flag status */
471 new_direct_link_flag
= BIT(forw_packet_aggr
->num_packets
);
472 forw_packet_aggr
->direct_link_flags
|= new_direct_link_flag
;
476 static void batadv_iv_ogm_queue_add(struct batadv_priv
*bat_priv
,
477 unsigned char *packet_buff
,
479 struct batadv_hard_iface
*if_incoming
,
480 int own_packet
, unsigned long send_time
)
482 /* _aggr -> pointer to the packet we want to aggregate with
483 * _pos -> pointer to the position in the queue
485 struct batadv_forw_packet
*forw_packet_aggr
= NULL
;
486 struct batadv_forw_packet
*forw_packet_pos
= NULL
;
487 struct hlist_node
*tmp_node
;
488 struct batadv_ogm_packet
*batadv_ogm_packet
;
490 unsigned long max_aggregation_jiffies
;
492 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_buff
;
493 direct_link
= batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
? 1 : 0;
494 max_aggregation_jiffies
= msecs_to_jiffies(BATADV_MAX_AGGREGATION_MS
);
496 /* find position for the packet in the forward queue */
497 spin_lock_bh(&bat_priv
->forw_bat_list_lock
);
498 /* own packets are not to be aggregated */
499 if ((atomic_read(&bat_priv
->aggregated_ogms
)) && (!own_packet
)) {
500 hlist_for_each_entry(forw_packet_pos
, tmp_node
,
501 &bat_priv
->forw_bat_list
, list
) {
502 if (batadv_iv_ogm_can_aggregate(batadv_ogm_packet
,
503 bat_priv
, packet_len
,
504 send_time
, direct_link
,
507 forw_packet_aggr
= forw_packet_pos
;
513 /* nothing to aggregate with - either aggregation disabled or no
514 * suitable aggregation packet found
516 if (!forw_packet_aggr
) {
517 /* the following section can run without the lock */
518 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
520 /* if we could not aggregate this packet with one of the others
521 * we hold it back for a while, so that it might be aggregated
524 if (!own_packet
&& atomic_read(&bat_priv
->aggregated_ogms
))
525 send_time
+= max_aggregation_jiffies
;
527 batadv_iv_ogm_aggregate_new(packet_buff
, packet_len
,
528 send_time
, direct_link
,
529 if_incoming
, own_packet
);
531 batadv_iv_ogm_aggregate(forw_packet_aggr
, packet_buff
,
532 packet_len
, direct_link
);
533 spin_unlock_bh(&bat_priv
->forw_bat_list_lock
);
537 static void batadv_iv_ogm_forward(struct batadv_orig_node
*orig_node
,
538 const struct ethhdr
*ethhdr
,
539 struct batadv_ogm_packet
*batadv_ogm_packet
,
540 bool is_single_hop_neigh
,
541 bool is_from_best_next_hop
,
542 struct batadv_hard_iface
*if_incoming
)
544 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
545 uint8_t tt_num_changes
;
547 if (batadv_ogm_packet
->header
.ttl
<= 1) {
548 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
, "ttl exceeded\n");
552 if (!is_from_best_next_hop
) {
553 /* Mark the forwarded packet when it is not coming from our
554 * best next hop. We still need to forward the packet for our
555 * neighbor link quality detection to work in case the packet
556 * originated from a single hop neighbor. Otherwise we can
557 * simply drop the ogm.
559 if (is_single_hop_neigh
)
560 batadv_ogm_packet
->flags
|= BATADV_NOT_BEST_NEXT_HOP
;
565 tt_num_changes
= batadv_ogm_packet
->tt_num_changes
;
567 batadv_ogm_packet
->header
.ttl
--;
568 memcpy(batadv_ogm_packet
->prev_sender
, ethhdr
->h_source
, ETH_ALEN
);
570 /* apply hop penalty */
571 batadv_ogm_packet
->tq
= batadv_hop_penalty(batadv_ogm_packet
->tq
,
574 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
575 "Forwarding packet: tq: %i, ttl: %i\n",
576 batadv_ogm_packet
->tq
, batadv_ogm_packet
->header
.ttl
);
578 /* switch of primaries first hop flag when forwarding */
579 batadv_ogm_packet
->flags
&= ~BATADV_PRIMARIES_FIRST_HOP
;
580 if (is_single_hop_neigh
)
581 batadv_ogm_packet
->flags
|= BATADV_DIRECTLINK
;
583 batadv_ogm_packet
->flags
&= ~BATADV_DIRECTLINK
;
585 batadv_iv_ogm_queue_add(bat_priv
, (unsigned char *)batadv_ogm_packet
,
586 BATADV_OGM_HLEN
+ batadv_tt_len(tt_num_changes
),
587 if_incoming
, 0, batadv_iv_ogm_fwd_send_time());
590 static void batadv_iv_ogm_schedule(struct batadv_hard_iface
*hard_iface
)
592 struct batadv_priv
*bat_priv
= netdev_priv(hard_iface
->soft_iface
);
593 struct batadv_ogm_packet
*batadv_ogm_packet
;
594 struct batadv_hard_iface
*primary_if
;
595 int vis_server
, tt_num_changes
= 0;
599 vis_server
= atomic_read(&bat_priv
->vis_mode
);
600 primary_if
= batadv_primary_if_get_selected(bat_priv
);
602 if (hard_iface
== primary_if
)
603 tt_num_changes
= batadv_tt_append_diff(bat_priv
,
604 &hard_iface
->packet_buff
,
605 &hard_iface
->packet_len
,
608 batadv_ogm_packet
= (struct batadv_ogm_packet
*)hard_iface
->packet_buff
;
610 /* change sequence number to network order */
611 seqno
= (uint32_t)atomic_read(&hard_iface
->seqno
);
612 batadv_ogm_packet
->seqno
= htonl(seqno
);
613 atomic_inc(&hard_iface
->seqno
);
615 batadv_ogm_packet
->ttvn
= atomic_read(&bat_priv
->tt
.vn
);
616 batadv_ogm_packet
->tt_crc
= htons(bat_priv
->tt
.local_crc
);
617 if (tt_num_changes
>= 0)
618 batadv_ogm_packet
->tt_num_changes
= tt_num_changes
;
620 if (vis_server
== BATADV_VIS_TYPE_SERVER_SYNC
)
621 batadv_ogm_packet
->flags
|= BATADV_VIS_SERVER
;
623 batadv_ogm_packet
->flags
&= ~BATADV_VIS_SERVER
;
625 if (hard_iface
== primary_if
&&
626 atomic_read(&bat_priv
->gw_mode
) == BATADV_GW_MODE_SERVER
) {
627 bandwidth
= (uint8_t)atomic_read(&bat_priv
->gw_bandwidth
);
628 batadv_ogm_packet
->gw_flags
= bandwidth
;
630 batadv_ogm_packet
->gw_flags
= BATADV_NO_FLAGS
;
633 batadv_slide_own_bcast_window(hard_iface
);
634 batadv_iv_ogm_queue_add(bat_priv
, hard_iface
->packet_buff
,
635 hard_iface
->packet_len
, hard_iface
, 1,
636 batadv_iv_ogm_emit_send_time(bat_priv
));
639 batadv_hardif_free_ref(primary_if
);
643 batadv_iv_ogm_orig_update(struct batadv_priv
*bat_priv
,
644 struct batadv_orig_node
*orig_node
,
645 const struct ethhdr
*ethhdr
,
646 const struct batadv_ogm_packet
*batadv_ogm_packet
,
647 struct batadv_hard_iface
*if_incoming
,
648 const unsigned char *tt_buff
,
651 struct batadv_neigh_node
*neigh_node
= NULL
, *tmp_neigh_node
= NULL
;
652 struct batadv_neigh_node
*router
= NULL
;
653 struct batadv_orig_node
*orig_node_tmp
;
654 struct hlist_node
*node
;
656 uint8_t sum_orig
, sum_neigh
;
660 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
661 "update_originator(): Searching and updating originator entry of received packet\n");
664 hlist_for_each_entry_rcu(tmp_neigh_node
, node
,
665 &orig_node
->neigh_list
, list
) {
666 neigh_addr
= tmp_neigh_node
->addr
;
667 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
668 tmp_neigh_node
->if_incoming
== if_incoming
&&
669 atomic_inc_not_zero(&tmp_neigh_node
->refcount
)) {
671 batadv_neigh_node_free_ref(neigh_node
);
672 neigh_node
= tmp_neigh_node
;
679 spin_lock_bh(&tmp_neigh_node
->lq_update_lock
);
680 batadv_ring_buffer_set(tmp_neigh_node
->tq_recv
,
681 &tmp_neigh_node
->tq_index
, 0);
682 tq_avg
= batadv_ring_buffer_avg(tmp_neigh_node
->tq_recv
);
683 tmp_neigh_node
->tq_avg
= tq_avg
;
684 spin_unlock_bh(&tmp_neigh_node
->lq_update_lock
);
688 struct batadv_orig_node
*orig_tmp
;
690 orig_tmp
= batadv_get_orig_node(bat_priv
, ethhdr
->h_source
);
694 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
697 batadv_ogm_packet
->seqno
);
699 batadv_orig_node_free_ref(orig_tmp
);
703 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
704 "Updating existing last-hop neighbor of originator\n");
708 orig_node
->flags
= batadv_ogm_packet
->flags
;
709 neigh_node
->last_seen
= jiffies
;
711 spin_lock_bh(&neigh_node
->lq_update_lock
);
712 batadv_ring_buffer_set(neigh_node
->tq_recv
,
713 &neigh_node
->tq_index
,
714 batadv_ogm_packet
->tq
);
715 neigh_node
->tq_avg
= batadv_ring_buffer_avg(neigh_node
->tq_recv
);
716 spin_unlock_bh(&neigh_node
->lq_update_lock
);
719 orig_node
->last_ttl
= batadv_ogm_packet
->header
.ttl
;
720 neigh_node
->last_ttl
= batadv_ogm_packet
->header
.ttl
;
723 batadv_bonding_candidate_add(orig_node
, neigh_node
);
725 /* if this neighbor already is our next hop there is nothing
728 router
= batadv_orig_node_get_router(orig_node
);
729 if (router
== neigh_node
)
732 /* if this neighbor does not offer a better TQ we won't consider it */
733 if (router
&& (router
->tq_avg
> neigh_node
->tq_avg
))
736 /* if the TQ is the same and the link not more symmetric we
737 * won't consider it either
739 if (router
&& (neigh_node
->tq_avg
== router
->tq_avg
)) {
740 orig_node_tmp
= router
->orig_node
;
741 spin_lock_bh(&orig_node_tmp
->ogm_cnt_lock
);
742 if_num
= router
->if_incoming
->if_num
;
743 sum_orig
= orig_node_tmp
->bcast_own_sum
[if_num
];
744 spin_unlock_bh(&orig_node_tmp
->ogm_cnt_lock
);
746 orig_node_tmp
= neigh_node
->orig_node
;
747 spin_lock_bh(&orig_node_tmp
->ogm_cnt_lock
);
748 if_num
= neigh_node
->if_incoming
->if_num
;
749 sum_neigh
= orig_node_tmp
->bcast_own_sum
[if_num
];
750 spin_unlock_bh(&orig_node_tmp
->ogm_cnt_lock
);
752 if (sum_orig
>= sum_neigh
)
756 batadv_update_route(bat_priv
, orig_node
, neigh_node
);
759 /* I have to check for transtable changes only if the OGM has been
760 * sent through a primary interface
762 if (((batadv_ogm_packet
->orig
!= ethhdr
->h_source
) &&
763 (batadv_ogm_packet
->header
.ttl
> 2)) ||
764 (batadv_ogm_packet
->flags
& BATADV_PRIMARIES_FIRST_HOP
))
765 batadv_tt_update_orig(bat_priv
, orig_node
, tt_buff
,
766 batadv_ogm_packet
->tt_num_changes
,
767 batadv_ogm_packet
->ttvn
,
768 ntohs(batadv_ogm_packet
->tt_crc
));
770 if (orig_node
->gw_flags
!= batadv_ogm_packet
->gw_flags
)
771 batadv_gw_node_update(bat_priv
, orig_node
,
772 batadv_ogm_packet
->gw_flags
);
774 orig_node
->gw_flags
= batadv_ogm_packet
->gw_flags
;
776 /* restart gateway selection if fast or late switching was enabled */
777 if ((orig_node
->gw_flags
) &&
778 (atomic_read(&bat_priv
->gw_mode
) == BATADV_GW_MODE_CLIENT
) &&
779 (atomic_read(&bat_priv
->gw_sel_class
) > 2))
780 batadv_gw_check_election(bat_priv
, orig_node
);
788 batadv_neigh_node_free_ref(neigh_node
);
790 batadv_neigh_node_free_ref(router
);
793 static int batadv_iv_ogm_calc_tq(struct batadv_orig_node
*orig_node
,
794 struct batadv_orig_node
*orig_neigh_node
,
795 struct batadv_ogm_packet
*batadv_ogm_packet
,
796 struct batadv_hard_iface
*if_incoming
)
798 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
799 struct batadv_neigh_node
*neigh_node
= NULL
, *tmp_neigh_node
;
800 struct hlist_node
*node
;
802 uint8_t orig_eq_count
, neigh_rq_count
, neigh_rq_inv
, tq_own
;
803 unsigned int neigh_rq_inv_cube
, neigh_rq_max_cube
;
804 int tq_asym_penalty
, inv_asym_penalty
, ret
= 0;
805 unsigned int combined_tq
;
807 /* find corresponding one hop neighbor */
809 hlist_for_each_entry_rcu(tmp_neigh_node
, node
,
810 &orig_neigh_node
->neigh_list
, list
) {
812 if (!batadv_compare_eth(tmp_neigh_node
->addr
,
813 orig_neigh_node
->orig
))
816 if (tmp_neigh_node
->if_incoming
!= if_incoming
)
819 if (!atomic_inc_not_zero(&tmp_neigh_node
->refcount
))
822 neigh_node
= tmp_neigh_node
;
828 neigh_node
= batadv_iv_ogm_neigh_new(if_incoming
,
829 orig_neigh_node
->orig
,
832 batadv_ogm_packet
->seqno
);
837 /* if orig_node is direct neighbor update neigh_node last_seen */
838 if (orig_node
== orig_neigh_node
)
839 neigh_node
->last_seen
= jiffies
;
841 orig_node
->last_seen
= jiffies
;
843 /* find packet count of corresponding one hop neighbor */
844 spin_lock_bh(&orig_node
->ogm_cnt_lock
);
845 orig_eq_count
= orig_neigh_node
->bcast_own_sum
[if_incoming
->if_num
];
846 neigh_rq_count
= neigh_node
->real_packet_count
;
847 spin_unlock_bh(&orig_node
->ogm_cnt_lock
);
849 /* pay attention to not get a value bigger than 100 % */
850 if (orig_eq_count
> neigh_rq_count
)
851 total_count
= neigh_rq_count
;
853 total_count
= orig_eq_count
;
855 /* if we have too few packets (too less data) we set tq_own to zero
856 * if we receive too few packets it is not considered bidirectional
858 if (total_count
< BATADV_TQ_LOCAL_BIDRECT_SEND_MINIMUM
||
859 neigh_rq_count
< BATADV_TQ_LOCAL_BIDRECT_RECV_MINIMUM
)
862 /* neigh_node->real_packet_count is never zero as we
863 * only purge old information when getting new
866 tq_own
= (BATADV_TQ_MAX_VALUE
* total_count
) / neigh_rq_count
;
868 /* 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
869 * affect the nearly-symmetric links only a little, but
870 * punishes asymmetric links more. This will give a value
871 * between 0 and TQ_MAX_VALUE
873 neigh_rq_inv
= BATADV_TQ_LOCAL_WINDOW_SIZE
- neigh_rq_count
;
874 neigh_rq_inv_cube
= neigh_rq_inv
* neigh_rq_inv
* neigh_rq_inv
;
875 neigh_rq_max_cube
= BATADV_TQ_LOCAL_WINDOW_SIZE
*
876 BATADV_TQ_LOCAL_WINDOW_SIZE
*
877 BATADV_TQ_LOCAL_WINDOW_SIZE
;
878 inv_asym_penalty
= BATADV_TQ_MAX_VALUE
* neigh_rq_inv_cube
;
879 inv_asym_penalty
/= neigh_rq_max_cube
;
880 tq_asym_penalty
= BATADV_TQ_MAX_VALUE
- inv_asym_penalty
;
882 combined_tq
= batadv_ogm_packet
->tq
* tq_own
* tq_asym_penalty
;
883 combined_tq
/= BATADV_TQ_MAX_VALUE
* BATADV_TQ_MAX_VALUE
;
884 batadv_ogm_packet
->tq
= combined_tq
;
886 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
887 "bidirectional: orig = %-15pM neigh = %-15pM => own_bcast = %2i, real recv = %2i, local tq: %3i, asym_penalty: %3i, total tq: %3i\n",
888 orig_node
->orig
, orig_neigh_node
->orig
, total_count
,
889 neigh_rq_count
, tq_own
,
890 tq_asym_penalty
, batadv_ogm_packet
->tq
);
892 /* if link has the minimum required transmission quality
893 * consider it bidirectional
895 if (batadv_ogm_packet
->tq
>= BATADV_TQ_TOTAL_BIDRECT_LIMIT
)
900 batadv_neigh_node_free_ref(neigh_node
);
904 /* processes a batman packet for all interfaces, adjusts the sequence number and
905 * finds out whether it is a duplicate.
907 * 1 the packet is a duplicate
908 * 0 the packet has not yet been received
909 * -1 the packet is old and has been received while the seqno window
910 * was protected. Caller should drop it.
913 batadv_iv_ogm_update_seqnos(const struct ethhdr
*ethhdr
,
914 const struct batadv_ogm_packet
*batadv_ogm_packet
,
915 const struct batadv_hard_iface
*if_incoming
)
917 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
918 struct batadv_orig_node
*orig_node
;
919 struct batadv_neigh_node
*tmp_neigh_node
;
920 struct hlist_node
*node
;
921 int is_duplicate
= 0;
924 int set_mark
, ret
= -1;
925 uint32_t seqno
= ntohl(batadv_ogm_packet
->seqno
);
927 uint8_t packet_count
;
929 orig_node
= batadv_get_orig_node(bat_priv
, batadv_ogm_packet
->orig
);
933 spin_lock_bh(&orig_node
->ogm_cnt_lock
);
934 seq_diff
= seqno
- orig_node
->last_real_seqno
;
936 /* signalize caller that the packet is to be dropped. */
937 if (!hlist_empty(&orig_node
->neigh_list
) &&
938 batadv_window_protected(bat_priv
, seq_diff
,
939 &orig_node
->batman_seqno_reset
))
943 hlist_for_each_entry_rcu(tmp_neigh_node
, node
,
944 &orig_node
->neigh_list
, list
) {
946 is_duplicate
|= batadv_test_bit(tmp_neigh_node
->real_bits
,
947 orig_node
->last_real_seqno
,
950 neigh_addr
= tmp_neigh_node
->addr
;
951 if (batadv_compare_eth(neigh_addr
, ethhdr
->h_source
) &&
952 tmp_neigh_node
->if_incoming
== if_incoming
)
957 /* if the window moved, set the update flag. */
958 need_update
|= batadv_bit_get_packet(bat_priv
,
959 tmp_neigh_node
->real_bits
,
962 packet_count
= bitmap_weight(tmp_neigh_node
->real_bits
,
963 BATADV_TQ_LOCAL_WINDOW_SIZE
);
964 tmp_neigh_node
->real_packet_count
= packet_count
;
969 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
970 "updating last_seqno: old %u, new %u\n",
971 orig_node
->last_real_seqno
, seqno
);
972 orig_node
->last_real_seqno
= seqno
;
978 spin_unlock_bh(&orig_node
->ogm_cnt_lock
);
979 batadv_orig_node_free_ref(orig_node
);
983 static void batadv_iv_ogm_process(const struct ethhdr
*ethhdr
,
984 struct batadv_ogm_packet
*batadv_ogm_packet
,
985 const unsigned char *tt_buff
,
986 struct batadv_hard_iface
*if_incoming
)
988 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
989 struct batadv_hard_iface
*hard_iface
;
990 struct batadv_orig_node
*orig_neigh_node
, *orig_node
;
991 struct batadv_neigh_node
*router
= NULL
, *router_router
= NULL
;
992 struct batadv_neigh_node
*orig_neigh_router
= NULL
;
993 int has_directlink_flag
;
994 int is_my_addr
= 0, is_my_orig
= 0, is_my_oldorig
= 0;
995 int is_broadcast
= 0, is_bidirect
;
996 bool is_single_hop_neigh
= false;
997 bool is_from_best_next_hop
= false;
998 int is_duplicate
, sameseq
, simlar_ttl
;
999 uint32_t if_incoming_seqno
;
1000 uint8_t *prev_sender
;
1002 /* Silently drop when the batman packet is actually not a
1005 * This might happen if a packet is padded (e.g. Ethernet has a
1006 * minimum frame length of 64 byte) and the aggregation interprets
1007 * it as an additional length.
1009 * TODO: A more sane solution would be to have a bit in the
1010 * batadv_ogm_packet to detect whether the packet is the last
1011 * packet in an aggregation. Here we expect that the padding
1012 * is always zero (or not 0x01)
1014 if (batadv_ogm_packet
->header
.packet_type
!= BATADV_IV_OGM
)
1017 /* could be changed by schedule_own_packet() */
1018 if_incoming_seqno
= atomic_read(&if_incoming
->seqno
);
1020 if (batadv_ogm_packet
->flags
& BATADV_DIRECTLINK
)
1021 has_directlink_flag
= 1;
1023 has_directlink_flag
= 0;
1025 if (batadv_compare_eth(ethhdr
->h_source
, batadv_ogm_packet
->orig
))
1026 is_single_hop_neigh
= true;
1028 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1029 "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",
1030 ethhdr
->h_source
, if_incoming
->net_dev
->name
,
1031 if_incoming
->net_dev
->dev_addr
, batadv_ogm_packet
->orig
,
1032 batadv_ogm_packet
->prev_sender
,
1033 ntohl(batadv_ogm_packet
->seqno
), batadv_ogm_packet
->ttvn
,
1034 ntohs(batadv_ogm_packet
->tt_crc
),
1035 batadv_ogm_packet
->tt_num_changes
, batadv_ogm_packet
->tq
,
1036 batadv_ogm_packet
->header
.ttl
,
1037 batadv_ogm_packet
->header
.version
, has_directlink_flag
);
1040 list_for_each_entry_rcu(hard_iface
, &batadv_hardif_list
, list
) {
1041 if (hard_iface
->if_status
!= BATADV_IF_ACTIVE
)
1044 if (hard_iface
->soft_iface
!= if_incoming
->soft_iface
)
1047 if (batadv_compare_eth(ethhdr
->h_source
,
1048 hard_iface
->net_dev
->dev_addr
))
1051 if (batadv_compare_eth(batadv_ogm_packet
->orig
,
1052 hard_iface
->net_dev
->dev_addr
))
1055 if (batadv_compare_eth(batadv_ogm_packet
->prev_sender
,
1056 hard_iface
->net_dev
->dev_addr
))
1059 if (is_broadcast_ether_addr(ethhdr
->h_source
))
1064 if (batadv_ogm_packet
->header
.version
!= BATADV_COMPAT_VERSION
) {
1065 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1066 "Drop packet: incompatible batman version (%i)\n",
1067 batadv_ogm_packet
->header
.version
);
1072 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1073 "Drop packet: received my own broadcast (sender: %pM)\n",
1079 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1080 "Drop packet: ignoring all packets with broadcast source addr (sender: %pM)\n",
1086 unsigned long *word
;
1092 orig_neigh_node
= batadv_get_orig_node(bat_priv
,
1094 if (!orig_neigh_node
)
1097 /* neighbor has to indicate direct link and it has to
1098 * come via the corresponding interface
1099 * save packet seqno for bidirectional check
1101 if (has_directlink_flag
&&
1102 batadv_compare_eth(if_incoming
->net_dev
->dev_addr
,
1103 batadv_ogm_packet
->orig
)) {
1104 if_num
= if_incoming
->if_num
;
1105 offset
= if_num
* BATADV_NUM_WORDS
;
1107 spin_lock_bh(&orig_neigh_node
->ogm_cnt_lock
);
1108 word
= &(orig_neigh_node
->bcast_own
[offset
]);
1109 bit_pos
= if_incoming_seqno
- 2;
1110 bit_pos
-= ntohl(batadv_ogm_packet
->seqno
);
1111 batadv_set_bit(word
, bit_pos
);
1112 weight
= &orig_neigh_node
->bcast_own_sum
[if_num
];
1113 *weight
= bitmap_weight(word
,
1114 BATADV_TQ_LOCAL_WINDOW_SIZE
);
1115 spin_unlock_bh(&orig_neigh_node
->ogm_cnt_lock
);
1118 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1119 "Drop packet: originator packet from myself (via neighbor)\n");
1120 batadv_orig_node_free_ref(orig_neigh_node
);
1124 if (is_my_oldorig
) {
1125 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1126 "Drop packet: ignoring all rebroadcast echos (sender: %pM)\n",
1131 if (batadv_ogm_packet
->flags
& BATADV_NOT_BEST_NEXT_HOP
) {
1132 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1133 "Drop packet: ignoring all packets not forwarded from the best next hop (sender: %pM)\n",
1138 orig_node
= batadv_get_orig_node(bat_priv
, batadv_ogm_packet
->orig
);
1142 is_duplicate
= batadv_iv_ogm_update_seqnos(ethhdr
, batadv_ogm_packet
,
1145 if (is_duplicate
== -1) {
1146 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1147 "Drop packet: packet within seqno protection time (sender: %pM)\n",
1152 if (batadv_ogm_packet
->tq
== 0) {
1153 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1154 "Drop packet: originator packet with tq equal 0\n");
1158 router
= batadv_orig_node_get_router(orig_node
);
1160 router_router
= batadv_orig_node_get_router(router
->orig_node
);
1162 if ((router
&& router
->tq_avg
!= 0) &&
1163 (batadv_compare_eth(router
->addr
, ethhdr
->h_source
)))
1164 is_from_best_next_hop
= true;
1166 prev_sender
= batadv_ogm_packet
->prev_sender
;
1167 /* avoid temporary routing loops */
1168 if (router
&& router_router
&&
1169 (batadv_compare_eth(router
->addr
, prev_sender
)) &&
1170 !(batadv_compare_eth(batadv_ogm_packet
->orig
, prev_sender
)) &&
1171 (batadv_compare_eth(router
->addr
, router_router
->addr
))) {
1172 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1173 "Drop packet: ignoring all rebroadcast packets that may make me loop (sender: %pM)\n",
1178 /* if sender is a direct neighbor the sender mac equals
1181 if (is_single_hop_neigh
)
1182 orig_neigh_node
= orig_node
;
1184 orig_neigh_node
= batadv_get_orig_node(bat_priv
,
1187 if (!orig_neigh_node
)
1190 orig_neigh_router
= batadv_orig_node_get_router(orig_neigh_node
);
1192 /* drop packet if sender is not a direct neighbor and if we
1193 * don't route towards it
1195 if (!is_single_hop_neigh
&& (!orig_neigh_router
)) {
1196 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1197 "Drop packet: OGM via unknown neighbor!\n");
1201 is_bidirect
= batadv_iv_ogm_calc_tq(orig_node
, orig_neigh_node
,
1202 batadv_ogm_packet
, if_incoming
);
1204 batadv_bonding_save_primary(orig_node
, orig_neigh_node
,
1207 /* update ranking if it is not a duplicate or has the same
1208 * seqno and similar ttl as the non-duplicate
1210 sameseq
= orig_node
->last_real_seqno
== ntohl(batadv_ogm_packet
->seqno
);
1211 simlar_ttl
= orig_node
->last_ttl
- 3 <= batadv_ogm_packet
->header
.ttl
;
1212 if (is_bidirect
&& (!is_duplicate
|| (sameseq
&& simlar_ttl
)))
1213 batadv_iv_ogm_orig_update(bat_priv
, orig_node
, ethhdr
,
1214 batadv_ogm_packet
, if_incoming
,
1215 tt_buff
, is_duplicate
);
1217 /* is single hop (direct) neighbor */
1218 if (is_single_hop_neigh
) {
1220 /* mark direct link on incoming interface */
1221 batadv_iv_ogm_forward(orig_node
, ethhdr
, batadv_ogm_packet
,
1222 is_single_hop_neigh
,
1223 is_from_best_next_hop
, if_incoming
);
1225 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1226 "Forwarding packet: rebroadcast neighbor packet with direct link flag\n");
1230 /* multihop originator */
1232 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1233 "Drop packet: not received via bidirectional link\n");
1238 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1239 "Drop packet: duplicate packet received\n");
1243 batadv_dbg(BATADV_DBG_BATMAN
, bat_priv
,
1244 "Forwarding packet: rebroadcast originator packet\n");
1245 batadv_iv_ogm_forward(orig_node
, ethhdr
, batadv_ogm_packet
,
1246 is_single_hop_neigh
, is_from_best_next_hop
,
1250 if ((orig_neigh_node
) && (!is_single_hop_neigh
))
1251 batadv_orig_node_free_ref(orig_neigh_node
);
1254 batadv_neigh_node_free_ref(router
);
1256 batadv_neigh_node_free_ref(router_router
);
1257 if (orig_neigh_router
)
1258 batadv_neigh_node_free_ref(orig_neigh_router
);
1260 batadv_orig_node_free_ref(orig_node
);
1263 static int batadv_iv_ogm_receive(struct sk_buff
*skb
,
1264 struct batadv_hard_iface
*if_incoming
)
1266 struct batadv_priv
*bat_priv
= netdev_priv(if_incoming
->soft_iface
);
1267 struct batadv_ogm_packet
*batadv_ogm_packet
;
1268 struct ethhdr
*ethhdr
;
1269 int buff_pos
= 0, packet_len
;
1270 unsigned char *tt_buff
, *packet_buff
;
1272 uint8_t *packet_pos
;
1274 ret
= batadv_check_management_packet(skb
, if_incoming
, BATADV_OGM_HLEN
);
1278 /* did we receive a B.A.T.M.A.N. IV OGM packet on an interface
1279 * that does not have B.A.T.M.A.N. IV enabled ?
1281 if (bat_priv
->bat_algo_ops
->bat_ogm_emit
!= batadv_iv_ogm_emit
)
1284 batadv_inc_counter(bat_priv
, BATADV_CNT_MGMT_RX
);
1285 batadv_add_counter(bat_priv
, BATADV_CNT_MGMT_RX_BYTES
,
1286 skb
->len
+ ETH_HLEN
);
1288 packet_len
= skb_headlen(skb
);
1289 ethhdr
= (struct ethhdr
*)skb_mac_header(skb
);
1290 packet_buff
= skb
->data
;
1291 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_buff
;
1293 /* unpack the aggregated packets and process them one by one */
1295 tt_buff
= packet_buff
+ buff_pos
+ BATADV_OGM_HLEN
;
1297 batadv_iv_ogm_process(ethhdr
, batadv_ogm_packet
, tt_buff
,
1300 buff_pos
+= BATADV_OGM_HLEN
;
1301 buff_pos
+= batadv_tt_len(batadv_ogm_packet
->tt_num_changes
);
1303 packet_pos
= packet_buff
+ buff_pos
;
1304 batadv_ogm_packet
= (struct batadv_ogm_packet
*)packet_pos
;
1305 } while (batadv_iv_ogm_aggr_packet(buff_pos
, packet_len
,
1306 batadv_ogm_packet
->tt_num_changes
));
1309 return NET_RX_SUCCESS
;
1312 static struct batadv_algo_ops batadv_batman_iv __read_mostly
= {
1313 .name
= "BATMAN_IV",
1314 .bat_iface_enable
= batadv_iv_ogm_iface_enable
,
1315 .bat_iface_disable
= batadv_iv_ogm_iface_disable
,
1316 .bat_iface_update_mac
= batadv_iv_ogm_iface_update_mac
,
1317 .bat_primary_iface_set
= batadv_iv_ogm_primary_iface_set
,
1318 .bat_ogm_schedule
= batadv_iv_ogm_schedule
,
1319 .bat_ogm_emit
= batadv_iv_ogm_emit
,
1322 int __init
batadv_iv_init(void)
1326 /* batman originator packet */
1327 ret
= batadv_recv_handler_register(BATADV_IV_OGM
,
1328 batadv_iv_ogm_receive
);
1332 ret
= batadv_algo_register(&batadv_batman_iv
);
1334 goto handler_unregister
;
1339 batadv_recv_handler_unregister(BATADV_IV_OGM
);