1 /* Copyright (C) 2011-2013 B.A.T.M.A.N. contributors:
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
22 #include "hard-interface.h"
23 #include "originator.h"
24 #include "bridge_loop_avoidance.h"
25 #include "translation-table.h"
28 #include <linux/etherdevice.h>
29 #include <linux/crc16.h>
30 #include <linux/if_arp.h>
32 #include <linux/if_vlan.h>
34 static const uint8_t batadv_announce_mac[4] = {0x43, 0x05, 0x43, 0x05};
36 static void batadv_bla_periodic_work(struct work_struct *work);
38 batadv_bla_send_announce(struct batadv_priv *bat_priv,
39 struct batadv_bla_backbone_gw *backbone_gw);
41 /* return the index of the claim */
42 static inline uint32_t batadv_choose_claim(const void *data, uint32_t size)
44 struct batadv_bla_claim *claim = (struct batadv_bla_claim *)data;
47 hash = batadv_hash_bytes(hash, &claim->addr, sizeof(claim->addr));
48 hash = batadv_hash_bytes(hash, &claim->vid, sizeof(claim->vid));
57 /* return the index of the backbone gateway */
58 static inline uint32_t batadv_choose_backbone_gw(const void *data,
61 const struct batadv_bla_claim *claim = (struct batadv_bla_claim *)data;
64 hash = batadv_hash_bytes(hash, &claim->addr, sizeof(claim->addr));
65 hash = batadv_hash_bytes(hash, &claim->vid, sizeof(claim->vid));
75 /* compares address and vid of two backbone gws */
76 static int batadv_compare_backbone_gw(const struct hlist_node *node,
79 const void *data1 = container_of(node, struct batadv_bla_backbone_gw,
81 const struct batadv_bla_backbone_gw *gw1 = data1, *gw2 = data2;
83 if (!batadv_compare_eth(gw1->orig, gw2->orig))
86 if (gw1->vid != gw2->vid)
92 /* compares address and vid of two claims */
93 static int batadv_compare_claim(const struct hlist_node *node,
96 const void *data1 = container_of(node, struct batadv_bla_claim,
98 const struct batadv_bla_claim *cl1 = data1, *cl2 = data2;
100 if (!batadv_compare_eth(cl1->addr, cl2->addr))
103 if (cl1->vid != cl2->vid)
109 /* free a backbone gw */
111 batadv_backbone_gw_free_ref(struct batadv_bla_backbone_gw *backbone_gw)
113 if (atomic_dec_and_test(&backbone_gw->refcount))
114 kfree_rcu(backbone_gw, rcu);
117 /* finally deinitialize the claim */
118 static void batadv_claim_free_rcu(struct rcu_head *rcu)
120 struct batadv_bla_claim *claim;
122 claim = container_of(rcu, struct batadv_bla_claim, rcu);
124 batadv_backbone_gw_free_ref(claim->backbone_gw);
128 /* free a claim, call claim_free_rcu if its the last reference */
129 static void batadv_claim_free_ref(struct batadv_bla_claim *claim)
131 if (atomic_dec_and_test(&claim->refcount))
132 call_rcu(&claim->rcu, batadv_claim_free_rcu);
135 /* @bat_priv: the bat priv with all the soft interface information
136 * @data: search data (may be local/static data)
138 * looks for a claim in the hash, and returns it if found
141 static struct batadv_bla_claim
142 *batadv_claim_hash_find(struct batadv_priv *bat_priv,
143 struct batadv_bla_claim *data)
145 struct batadv_hashtable *hash = bat_priv->bla.claim_hash;
146 struct hlist_head *head;
147 struct hlist_node *node;
148 struct batadv_bla_claim *claim;
149 struct batadv_bla_claim *claim_tmp = NULL;
155 index = batadv_choose_claim(data, hash->size);
156 head = &hash->table[index];
159 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
160 if (!batadv_compare_claim(&claim->hash_entry, data))
163 if (!atomic_inc_not_zero(&claim->refcount))
175 * batadv_backbone_hash_find - looks for a claim in the hash
176 * @bat_priv: the bat priv with all the soft interface information
177 * @addr: the address of the originator
180 * Returns claim if found or NULL otherwise.
182 static struct batadv_bla_backbone_gw *
183 batadv_backbone_hash_find(struct batadv_priv *bat_priv,
184 uint8_t *addr, short vid)
186 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
187 struct hlist_head *head;
188 struct hlist_node *node;
189 struct batadv_bla_backbone_gw search_entry, *backbone_gw;
190 struct batadv_bla_backbone_gw *backbone_gw_tmp = NULL;
196 memcpy(search_entry.orig, addr, ETH_ALEN);
197 search_entry.vid = vid;
199 index = batadv_choose_backbone_gw(&search_entry, hash->size);
200 head = &hash->table[index];
203 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
204 if (!batadv_compare_backbone_gw(&backbone_gw->hash_entry,
208 if (!atomic_inc_not_zero(&backbone_gw->refcount))
211 backbone_gw_tmp = backbone_gw;
216 return backbone_gw_tmp;
219 /* delete all claims for a backbone */
221 batadv_bla_del_backbone_claims(struct batadv_bla_backbone_gw *backbone_gw)
223 struct batadv_hashtable *hash;
224 struct hlist_node *node, *node_tmp;
225 struct hlist_head *head;
226 struct batadv_bla_claim *claim;
228 spinlock_t *list_lock; /* protects write access to the hash lists */
230 hash = backbone_gw->bat_priv->bla.claim_hash;
234 for (i = 0; i < hash->size; i++) {
235 head = &hash->table[i];
236 list_lock = &hash->list_locks[i];
238 spin_lock_bh(list_lock);
239 hlist_for_each_entry_safe(claim, node, node_tmp,
241 if (claim->backbone_gw != backbone_gw)
244 batadv_claim_free_ref(claim);
247 spin_unlock_bh(list_lock);
250 /* all claims gone, intialize CRC */
251 backbone_gw->crc = BATADV_BLA_CRC_INIT;
255 * batadv_bla_send_claim - sends a claim frame according to the provided info
256 * @bat_priv: the bat priv with all the soft interface information
257 * @orig: the mac address to be announced within the claim
259 * @claimtype: the type of the claim (CLAIM, UNCLAIM, ANNOUNCE, ...)
261 static void batadv_bla_send_claim(struct batadv_priv *bat_priv, uint8_t *mac,
262 short vid, int claimtype)
265 struct ethhdr *ethhdr;
266 struct batadv_hard_iface *primary_if;
267 struct net_device *soft_iface;
269 struct batadv_bla_claim_dst local_claim_dest;
272 primary_if = batadv_primary_if_get_selected(bat_priv);
276 memcpy(&local_claim_dest, &bat_priv->bla.claim_dest,
277 sizeof(local_claim_dest));
278 local_claim_dest.type = claimtype;
280 soft_iface = primary_if->soft_iface;
282 skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
283 /* IP DST: 0.0.0.0 */
285 primary_if->soft_iface,
286 /* IP SRC: 0.0.0.0 */
288 /* Ethernet DST: Broadcast */
290 /* Ethernet SRC/HW SRC: originator mac */
291 primary_if->net_dev->dev_addr,
292 /* HW DST: FF:43:05:XX:YY:YY
293 * with XX = claim type
294 * and YY:YY = group id
296 (uint8_t *)&local_claim_dest);
301 ethhdr = (struct ethhdr *)skb->data;
302 hw_src = (uint8_t *)ethhdr + ETH_HLEN + sizeof(struct arphdr);
304 /* now we pretend that the client would have sent this ... */
306 case BATADV_CLAIM_TYPE_CLAIM:
307 /* normal claim frame
308 * set Ethernet SRC to the clients mac
310 memcpy(ethhdr->h_source, mac, ETH_ALEN);
311 batadv_dbg(BATADV_DBG_BLA, bat_priv,
312 "bla_send_claim(): CLAIM %pM on vid %d\n", mac, vid);
314 case BATADV_CLAIM_TYPE_UNCLAIM:
316 * set HW SRC to the clients mac
318 memcpy(hw_src, mac, ETH_ALEN);
319 batadv_dbg(BATADV_DBG_BLA, bat_priv,
320 "bla_send_claim(): UNCLAIM %pM on vid %d\n", mac,
323 case BATADV_CLAIM_TYPE_ANNOUNCE:
324 /* announcement frame
325 * set HW SRC to the special mac containg the crc
327 memcpy(hw_src, mac, ETH_ALEN);
328 batadv_dbg(BATADV_DBG_BLA, bat_priv,
329 "bla_send_claim(): ANNOUNCE of %pM on vid %d\n",
330 ethhdr->h_source, vid);
332 case BATADV_CLAIM_TYPE_REQUEST:
334 * set HW SRC and header destination to the receiving backbone
337 memcpy(hw_src, mac, ETH_ALEN);
338 memcpy(ethhdr->h_dest, mac, ETH_ALEN);
339 batadv_dbg(BATADV_DBG_BLA, bat_priv,
340 "bla_send_claim(): REQUEST of %pM to %pMon vid %d\n",
341 ethhdr->h_source, ethhdr->h_dest, vid);
346 skb = vlan_insert_tag(skb, vid);
348 skb_reset_mac_header(skb);
349 skb->protocol = eth_type_trans(skb, soft_iface);
350 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
351 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
352 skb->len + ETH_HLEN);
353 soft_iface->last_rx = jiffies;
358 batadv_hardif_free_ref(primary_if);
362 * batadv_bla_get_backbone_gw
363 * @bat_priv: the bat priv with all the soft interface information
364 * @orig: the mac address of the originator
367 * searches for the backbone gw or creates a new one if it could not
370 static struct batadv_bla_backbone_gw *
371 batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, uint8_t *orig,
372 short vid, bool own_backbone)
374 struct batadv_bla_backbone_gw *entry;
375 struct batadv_orig_node *orig_node;
378 entry = batadv_backbone_hash_find(bat_priv, orig, vid);
383 batadv_dbg(BATADV_DBG_BLA, bat_priv,
384 "bla_get_backbone_gw(): not found (%pM, %d), creating new entry\n",
387 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
392 entry->lasttime = jiffies;
393 entry->crc = BATADV_BLA_CRC_INIT;
394 entry->bat_priv = bat_priv;
395 atomic_set(&entry->request_sent, 0);
396 atomic_set(&entry->wait_periods, 0);
397 memcpy(entry->orig, orig, ETH_ALEN);
399 /* one for the hash, one for returning */
400 atomic_set(&entry->refcount, 2);
402 hash_added = batadv_hash_add(bat_priv->bla.backbone_hash,
403 batadv_compare_backbone_gw,
404 batadv_choose_backbone_gw, entry,
407 if (unlikely(hash_added != 0)) {
408 /* hash failed, free the structure */
413 /* this is a gateway now, remove any tt entries */
414 orig_node = batadv_orig_hash_find(bat_priv, orig);
416 batadv_tt_global_del_orig(bat_priv, orig_node,
417 "became a backbone gateway");
418 batadv_orig_node_free_ref(orig_node);
422 batadv_bla_send_announce(bat_priv, entry);
424 /* this will be decreased in the worker thread */
425 atomic_inc(&entry->request_sent);
426 atomic_set(&entry->wait_periods, BATADV_BLA_WAIT_PERIODS);
427 atomic_inc(&bat_priv->bla.num_requests);
433 /* update or add the own backbone gw to make sure we announce
434 * where we receive other backbone gws
437 batadv_bla_update_own_backbone_gw(struct batadv_priv *bat_priv,
438 struct batadv_hard_iface *primary_if,
441 struct batadv_bla_backbone_gw *backbone_gw;
443 backbone_gw = batadv_bla_get_backbone_gw(bat_priv,
444 primary_if->net_dev->dev_addr,
446 if (unlikely(!backbone_gw))
449 backbone_gw->lasttime = jiffies;
450 batadv_backbone_gw_free_ref(backbone_gw);
453 /* @bat_priv: the bat priv with all the soft interface information
454 * @vid: the vid where the request came on
456 * Repeat all of our own claims, and finally send an ANNOUNCE frame
457 * to allow the requester another check if the CRC is correct now.
459 static void batadv_bla_answer_request(struct batadv_priv *bat_priv,
460 struct batadv_hard_iface *primary_if,
463 struct hlist_node *node;
464 struct hlist_head *head;
465 struct batadv_hashtable *hash;
466 struct batadv_bla_claim *claim;
467 struct batadv_bla_backbone_gw *backbone_gw;
470 batadv_dbg(BATADV_DBG_BLA, bat_priv,
471 "bla_answer_request(): received a claim request, send all of our own claims again\n");
473 backbone_gw = batadv_backbone_hash_find(bat_priv,
474 primary_if->net_dev->dev_addr,
479 hash = bat_priv->bla.claim_hash;
480 for (i = 0; i < hash->size; i++) {
481 head = &hash->table[i];
484 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
485 /* only own claims are interesting */
486 if (claim->backbone_gw != backbone_gw)
489 batadv_bla_send_claim(bat_priv, claim->addr, claim->vid,
490 BATADV_CLAIM_TYPE_CLAIM);
495 /* finally, send an announcement frame */
496 batadv_bla_send_announce(bat_priv, backbone_gw);
497 batadv_backbone_gw_free_ref(backbone_gw);
500 /* @backbone_gw: the backbone gateway from whom we are out of sync
502 * When the crc is wrong, ask the backbone gateway for a full table update.
503 * After the request, it will repeat all of his own claims and finally
504 * send an announcement claim with which we can check again.
506 static void batadv_bla_send_request(struct batadv_bla_backbone_gw *backbone_gw)
508 /* first, remove all old entries */
509 batadv_bla_del_backbone_claims(backbone_gw);
511 batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
512 "Sending REQUEST to %pM\n", backbone_gw->orig);
515 batadv_bla_send_claim(backbone_gw->bat_priv, backbone_gw->orig,
516 backbone_gw->vid, BATADV_CLAIM_TYPE_REQUEST);
518 /* no local broadcasts should be sent or received, for now. */
519 if (!atomic_read(&backbone_gw->request_sent)) {
520 atomic_inc(&backbone_gw->bat_priv->bla.num_requests);
521 atomic_set(&backbone_gw->request_sent, 1);
525 /* @bat_priv: the bat priv with all the soft interface information
526 * @backbone_gw: our backbone gateway which should be announced
528 * This function sends an announcement. It is called from multiple
531 static void batadv_bla_send_announce(struct batadv_priv *bat_priv,
532 struct batadv_bla_backbone_gw *backbone_gw)
534 uint8_t mac[ETH_ALEN];
537 memcpy(mac, batadv_announce_mac, 4);
538 crc = htons(backbone_gw->crc);
539 memcpy(&mac[4], &crc, 2);
541 batadv_bla_send_claim(bat_priv, mac, backbone_gw->vid,
542 BATADV_CLAIM_TYPE_ANNOUNCE);
546 * batadv_bla_add_claim - Adds a claim in the claim hash
547 * @bat_priv: the bat priv with all the soft interface information
548 * @mac: the mac address of the claim
549 * @vid: the VLAN ID of the frame
550 * @backbone_gw: the backbone gateway which claims it
552 static void batadv_bla_add_claim(struct batadv_priv *bat_priv,
553 const uint8_t *mac, const short vid,
554 struct batadv_bla_backbone_gw *backbone_gw)
556 struct batadv_bla_claim *claim;
557 struct batadv_bla_claim search_claim;
560 memcpy(search_claim.addr, mac, ETH_ALEN);
561 search_claim.vid = vid;
562 claim = batadv_claim_hash_find(bat_priv, &search_claim);
564 /* create a new claim entry if it does not exist yet. */
566 claim = kzalloc(sizeof(*claim), GFP_ATOMIC);
570 memcpy(claim->addr, mac, ETH_ALEN);
572 claim->lasttime = jiffies;
573 claim->backbone_gw = backbone_gw;
575 atomic_set(&claim->refcount, 2);
576 batadv_dbg(BATADV_DBG_BLA, bat_priv,
577 "bla_add_claim(): adding new entry %pM, vid %d to hash ...\n",
579 hash_added = batadv_hash_add(bat_priv->bla.claim_hash,
580 batadv_compare_claim,
581 batadv_choose_claim, claim,
584 if (unlikely(hash_added != 0)) {
585 /* only local changes happened. */
590 claim->lasttime = jiffies;
591 if (claim->backbone_gw == backbone_gw)
592 /* no need to register a new backbone */
595 batadv_dbg(BATADV_DBG_BLA, bat_priv,
596 "bla_add_claim(): changing ownership for %pM, vid %d\n",
599 claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
600 batadv_backbone_gw_free_ref(claim->backbone_gw);
602 /* set (new) backbone gw */
603 atomic_inc(&backbone_gw->refcount);
604 claim->backbone_gw = backbone_gw;
606 backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
607 backbone_gw->lasttime = jiffies;
610 batadv_claim_free_ref(claim);
613 /* Delete a claim from the claim hash which has the
614 * given mac address and vid.
616 static void batadv_bla_del_claim(struct batadv_priv *bat_priv,
617 const uint8_t *mac, const short vid)
619 struct batadv_bla_claim search_claim, *claim;
621 memcpy(search_claim.addr, mac, ETH_ALEN);
622 search_claim.vid = vid;
623 claim = batadv_claim_hash_find(bat_priv, &search_claim);
627 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_del_claim(): %pM, vid %d\n",
630 batadv_hash_remove(bat_priv->bla.claim_hash, batadv_compare_claim,
631 batadv_choose_claim, claim);
632 batadv_claim_free_ref(claim); /* reference from the hash is gone */
634 claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
636 /* don't need the reference from hash_find() anymore */
637 batadv_claim_free_ref(claim);
640 /* check for ANNOUNCE frame, return 1 if handled */
641 static int batadv_handle_announce(struct batadv_priv *bat_priv,
642 uint8_t *an_addr, uint8_t *backbone_addr,
645 struct batadv_bla_backbone_gw *backbone_gw;
648 if (memcmp(an_addr, batadv_announce_mac, 4) != 0)
651 backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid,
654 if (unlikely(!backbone_gw))
658 /* handle as ANNOUNCE frame */
659 backbone_gw->lasttime = jiffies;
660 crc = ntohs(*((__be16 *)(&an_addr[4])));
662 batadv_dbg(BATADV_DBG_BLA, bat_priv,
663 "handle_announce(): ANNOUNCE vid %d (sent by %pM)... CRC = %#.4x\n",
664 vid, backbone_gw->orig, crc);
666 if (backbone_gw->crc != crc) {
667 batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
668 "handle_announce(): CRC FAILED for %pM/%d (my = %#.4x, sent = %#.4x)\n",
669 backbone_gw->orig, backbone_gw->vid,
670 backbone_gw->crc, crc);
672 batadv_bla_send_request(backbone_gw);
674 /* if we have sent a request and the crc was OK,
675 * we can allow traffic again.
677 if (atomic_read(&backbone_gw->request_sent)) {
678 atomic_dec(&backbone_gw->bat_priv->bla.num_requests);
679 atomic_set(&backbone_gw->request_sent, 0);
683 batadv_backbone_gw_free_ref(backbone_gw);
687 /* check for REQUEST frame, return 1 if handled */
688 static int batadv_handle_request(struct batadv_priv *bat_priv,
689 struct batadv_hard_iface *primary_if,
690 uint8_t *backbone_addr,
691 struct ethhdr *ethhdr, short vid)
693 /* check for REQUEST frame */
694 if (!batadv_compare_eth(backbone_addr, ethhdr->h_dest))
697 /* sanity check, this should not happen on a normal switch,
698 * we ignore it in this case.
700 if (!batadv_compare_eth(ethhdr->h_dest, primary_if->net_dev->dev_addr))
703 batadv_dbg(BATADV_DBG_BLA, bat_priv,
704 "handle_request(): REQUEST vid %d (sent by %pM)...\n",
705 vid, ethhdr->h_source);
707 batadv_bla_answer_request(bat_priv, primary_if, vid);
711 /* check for UNCLAIM frame, return 1 if handled */
712 static int batadv_handle_unclaim(struct batadv_priv *bat_priv,
713 struct batadv_hard_iface *primary_if,
714 uint8_t *backbone_addr,
715 uint8_t *claim_addr, short vid)
717 struct batadv_bla_backbone_gw *backbone_gw;
719 /* unclaim in any case if it is our own */
720 if (primary_if && batadv_compare_eth(backbone_addr,
721 primary_if->net_dev->dev_addr))
722 batadv_bla_send_claim(bat_priv, claim_addr, vid,
723 BATADV_CLAIM_TYPE_UNCLAIM);
725 backbone_gw = batadv_backbone_hash_find(bat_priv, backbone_addr, vid);
730 /* this must be an UNCLAIM frame */
731 batadv_dbg(BATADV_DBG_BLA, bat_priv,
732 "handle_unclaim(): UNCLAIM %pM on vid %d (sent by %pM)...\n",
733 claim_addr, vid, backbone_gw->orig);
735 batadv_bla_del_claim(bat_priv, claim_addr, vid);
736 batadv_backbone_gw_free_ref(backbone_gw);
740 /* check for CLAIM frame, return 1 if handled */
741 static int batadv_handle_claim(struct batadv_priv *bat_priv,
742 struct batadv_hard_iface *primary_if,
743 uint8_t *backbone_addr, uint8_t *claim_addr,
746 struct batadv_bla_backbone_gw *backbone_gw;
748 /* register the gateway if not yet available, and add the claim. */
750 backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid,
753 if (unlikely(!backbone_gw))
756 /* this must be a CLAIM frame */
757 batadv_bla_add_claim(bat_priv, claim_addr, vid, backbone_gw);
758 if (batadv_compare_eth(backbone_addr, primary_if->net_dev->dev_addr))
759 batadv_bla_send_claim(bat_priv, claim_addr, vid,
760 BATADV_CLAIM_TYPE_CLAIM);
762 /* TODO: we could call something like tt_local_del() here. */
764 batadv_backbone_gw_free_ref(backbone_gw);
769 * batadv_check_claim_group
770 * @bat_priv: the bat priv with all the soft interface information
771 * @hw_src: the Hardware source in the ARP Header
772 * @hw_dst: the Hardware destination in the ARP Header
773 * @ethhdr: pointer to the Ethernet header of the claim frame
775 * checks if it is a claim packet and if its on the same group.
776 * This function also applies the group ID of the sender
777 * if it is in the same mesh.
780 * 2 - if it is a claim packet and on the same group
781 * 1 - if is a claim packet from another group
782 * 0 - if it is not a claim packet
784 static int batadv_check_claim_group(struct batadv_priv *bat_priv,
785 struct batadv_hard_iface *primary_if,
786 uint8_t *hw_src, uint8_t *hw_dst,
787 struct ethhdr *ethhdr)
789 uint8_t *backbone_addr;
790 struct batadv_orig_node *orig_node;
791 struct batadv_bla_claim_dst *bla_dst, *bla_dst_own;
793 bla_dst = (struct batadv_bla_claim_dst *)hw_dst;
794 bla_dst_own = &bat_priv->bla.claim_dest;
796 /* check if it is a claim packet in general */
797 if (memcmp(bla_dst->magic, bla_dst_own->magic,
798 sizeof(bla_dst->magic)) != 0)
801 /* if announcement packet, use the source,
802 * otherwise assume it is in the hw_src
804 switch (bla_dst->type) {
805 case BATADV_CLAIM_TYPE_CLAIM:
806 backbone_addr = hw_src;
808 case BATADV_CLAIM_TYPE_REQUEST:
809 case BATADV_CLAIM_TYPE_ANNOUNCE:
810 case BATADV_CLAIM_TYPE_UNCLAIM:
811 backbone_addr = ethhdr->h_source;
817 /* don't accept claim frames from ourselves */
818 if (batadv_compare_eth(backbone_addr, primary_if->net_dev->dev_addr))
821 /* if its already the same group, it is fine. */
822 if (bla_dst->group == bla_dst_own->group)
825 /* lets see if this originator is in our mesh */
826 orig_node = batadv_orig_hash_find(bat_priv, backbone_addr);
828 /* dont accept claims from gateways which are not in
829 * the same mesh or group.
834 /* if our mesh friends mac is bigger, use it for ourselves. */
835 if (ntohs(bla_dst->group) > ntohs(bla_dst_own->group)) {
836 batadv_dbg(BATADV_DBG_BLA, bat_priv,
837 "taking other backbones claim group: %#.4x\n",
838 ntohs(bla_dst->group));
839 bla_dst_own->group = bla_dst->group;
842 batadv_orig_node_free_ref(orig_node);
848 /* @bat_priv: the bat priv with all the soft interface information
849 * @skb: the frame to be checked
851 * Check if this is a claim frame, and process it accordingly.
853 * returns 1 if it was a claim frame, otherwise return 0 to
854 * tell the callee that it can use the frame on its own.
856 static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
857 struct batadv_hard_iface *primary_if,
860 struct ethhdr *ethhdr;
861 struct vlan_ethhdr *vhdr;
862 struct arphdr *arphdr;
863 uint8_t *hw_src, *hw_dst;
864 struct batadv_bla_claim_dst *bla_dst;
870 ethhdr = (struct ethhdr *)skb_mac_header(skb);
872 if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) {
873 vhdr = (struct vlan_ethhdr *)ethhdr;
874 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
875 proto = ntohs(vhdr->h_vlan_encapsulated_proto);
876 headlen = sizeof(*vhdr);
878 proto = ntohs(ethhdr->h_proto);
882 if (proto != ETH_P_ARP)
883 return 0; /* not a claim frame */
885 /* this must be a ARP frame. check if it is a claim. */
887 if (unlikely(!pskb_may_pull(skb, headlen + arp_hdr_len(skb->dev))))
890 /* pskb_may_pull() may have modified the pointers, get ethhdr again */
891 ethhdr = (struct ethhdr *)skb_mac_header(skb);
892 arphdr = (struct arphdr *)((uint8_t *)ethhdr + headlen);
894 /* Check whether the ARP frame carries a valid
897 if (arphdr->ar_hrd != htons(ARPHRD_ETHER))
899 if (arphdr->ar_pro != htons(ETH_P_IP))
901 if (arphdr->ar_hln != ETH_ALEN)
903 if (arphdr->ar_pln != 4)
906 hw_src = (uint8_t *)arphdr + sizeof(struct arphdr);
907 hw_dst = hw_src + ETH_ALEN + 4;
908 bla_dst = (struct batadv_bla_claim_dst *)hw_dst;
910 /* check if it is a claim frame. */
911 ret = batadv_check_claim_group(bat_priv, primary_if, hw_src, hw_dst,
914 batadv_dbg(BATADV_DBG_BLA, bat_priv,
915 "bla_process_claim(): received a claim frame from another group. From: %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n",
916 ethhdr->h_source, vid, hw_src, hw_dst);
921 /* become a backbone gw ourselves on this vlan if not happened yet */
922 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
924 /* check for the different types of claim frames ... */
925 switch (bla_dst->type) {
926 case BATADV_CLAIM_TYPE_CLAIM:
927 if (batadv_handle_claim(bat_priv, primary_if, hw_src,
928 ethhdr->h_source, vid))
931 case BATADV_CLAIM_TYPE_UNCLAIM:
932 if (batadv_handle_unclaim(bat_priv, primary_if,
933 ethhdr->h_source, hw_src, vid))
937 case BATADV_CLAIM_TYPE_ANNOUNCE:
938 if (batadv_handle_announce(bat_priv, hw_src, ethhdr->h_source,
942 case BATADV_CLAIM_TYPE_REQUEST:
943 if (batadv_handle_request(bat_priv, primary_if, hw_src, ethhdr,
949 batadv_dbg(BATADV_DBG_BLA, bat_priv,
950 "bla_process_claim(): ERROR - this looks like a claim frame, but is useless. eth src %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n",
951 ethhdr->h_source, vid, hw_src, hw_dst);
955 /* Check when we last heard from other nodes, and remove them in case of
956 * a time out, or clean all backbone gws if now is set.
958 static void batadv_bla_purge_backbone_gw(struct batadv_priv *bat_priv, int now)
960 struct batadv_bla_backbone_gw *backbone_gw;
961 struct hlist_node *node, *node_tmp;
962 struct hlist_head *head;
963 struct batadv_hashtable *hash;
964 spinlock_t *list_lock; /* protects write access to the hash lists */
967 hash = bat_priv->bla.backbone_hash;
971 for (i = 0; i < hash->size; i++) {
972 head = &hash->table[i];
973 list_lock = &hash->list_locks[i];
975 spin_lock_bh(list_lock);
976 hlist_for_each_entry_safe(backbone_gw, node, node_tmp,
980 if (!batadv_has_timed_out(backbone_gw->lasttime,
981 BATADV_BLA_BACKBONE_TIMEOUT))
984 batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
985 "bla_purge_backbone_gw(): backbone gw %pM timed out\n",
989 /* don't wait for the pending request anymore */
990 if (atomic_read(&backbone_gw->request_sent))
991 atomic_dec(&bat_priv->bla.num_requests);
993 batadv_bla_del_backbone_claims(backbone_gw);
996 batadv_backbone_gw_free_ref(backbone_gw);
998 spin_unlock_bh(list_lock);
1003 * batadv_bla_purge_claims
1004 * @bat_priv: the bat priv with all the soft interface information
1005 * @primary_if: the selected primary interface, may be NULL if now is set
1006 * @now: whether the whole hash shall be wiped now
1008 * Check when we heard last time from our own claims, and remove them in case of
1009 * a time out, or clean all claims if now is set
1011 static void batadv_bla_purge_claims(struct batadv_priv *bat_priv,
1012 struct batadv_hard_iface *primary_if,
1015 struct batadv_bla_claim *claim;
1016 struct hlist_node *node;
1017 struct hlist_head *head;
1018 struct batadv_hashtable *hash;
1021 hash = bat_priv->bla.claim_hash;
1025 for (i = 0; i < hash->size; i++) {
1026 head = &hash->table[i];
1029 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
1032 if (!batadv_compare_eth(claim->backbone_gw->orig,
1033 primary_if->net_dev->dev_addr))
1035 if (!batadv_has_timed_out(claim->lasttime,
1036 BATADV_BLA_CLAIM_TIMEOUT))
1039 batadv_dbg(BATADV_DBG_BLA, bat_priv,
1040 "bla_purge_claims(): %pM, vid %d, time out\n",
1041 claim->addr, claim->vid);
1044 batadv_handle_unclaim(bat_priv, primary_if,
1045 claim->backbone_gw->orig,
1046 claim->addr, claim->vid);
1053 * batadv_bla_update_orig_address
1054 * @bat_priv: the bat priv with all the soft interface information
1055 * @primary_if: the new selected primary_if
1056 * @oldif: the old primary interface, may be NULL
1058 * Update the backbone gateways when the own orig address changes.
1060 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
1061 struct batadv_hard_iface *primary_if,
1062 struct batadv_hard_iface *oldif)
1064 struct batadv_bla_backbone_gw *backbone_gw;
1065 struct hlist_node *node;
1066 struct hlist_head *head;
1067 struct batadv_hashtable *hash;
1071 /* reset bridge loop avoidance group id */
1072 group = htons(crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN));
1073 bat_priv->bla.claim_dest.group = group;
1076 batadv_bla_purge_claims(bat_priv, NULL, 1);
1077 batadv_bla_purge_backbone_gw(bat_priv, 1);
1081 hash = bat_priv->bla.backbone_hash;
1085 for (i = 0; i < hash->size; i++) {
1086 head = &hash->table[i];
1089 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1090 /* own orig still holds the old value. */
1091 if (!batadv_compare_eth(backbone_gw->orig,
1092 oldif->net_dev->dev_addr))
1095 memcpy(backbone_gw->orig,
1096 primary_if->net_dev->dev_addr, ETH_ALEN);
1097 /* send an announce frame so others will ask for our
1098 * claims and update their tables.
1100 batadv_bla_send_announce(bat_priv, backbone_gw);
1106 /* periodic work to do:
1107 * * purge structures when they are too old
1108 * * send announcements
1110 static void batadv_bla_periodic_work(struct work_struct *work)
1112 struct delayed_work *delayed_work;
1113 struct batadv_priv *bat_priv;
1114 struct batadv_priv_bla *priv_bla;
1115 struct hlist_node *node;
1116 struct hlist_head *head;
1117 struct batadv_bla_backbone_gw *backbone_gw;
1118 struct batadv_hashtable *hash;
1119 struct batadv_hard_iface *primary_if;
1122 delayed_work = container_of(work, struct delayed_work, work);
1123 priv_bla = container_of(delayed_work, struct batadv_priv_bla, work);
1124 bat_priv = container_of(priv_bla, struct batadv_priv, bla);
1125 primary_if = batadv_primary_if_get_selected(bat_priv);
1129 batadv_bla_purge_claims(bat_priv, primary_if, 0);
1130 batadv_bla_purge_backbone_gw(bat_priv, 0);
1132 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1135 hash = bat_priv->bla.backbone_hash;
1139 for (i = 0; i < hash->size; i++) {
1140 head = &hash->table[i];
1143 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1144 if (!batadv_compare_eth(backbone_gw->orig,
1145 primary_if->net_dev->dev_addr))
1148 backbone_gw->lasttime = jiffies;
1150 batadv_bla_send_announce(bat_priv, backbone_gw);
1152 /* request_sent is only set after creation to avoid
1153 * problems when we are not yet known as backbone gw
1156 * We can reset this now after we waited some periods
1157 * to give bridge forward delays and bla group forming
1161 if (atomic_read(&backbone_gw->request_sent) == 0)
1164 if (!atomic_dec_and_test(&backbone_gw->wait_periods))
1167 atomic_dec(&backbone_gw->bat_priv->bla.num_requests);
1168 atomic_set(&backbone_gw->request_sent, 0);
1174 batadv_hardif_free_ref(primary_if);
1176 queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work,
1177 msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH));
1180 /* The hash for claim and backbone hash receive the same key because they
1181 * are getting initialized by hash_new with the same key. Reinitializing
1182 * them with to different keys to allow nested locking without generating
1185 static struct lock_class_key batadv_claim_hash_lock_class_key;
1186 static struct lock_class_key batadv_backbone_hash_lock_class_key;
1188 /* initialize all bla structures */
1189 int batadv_bla_init(struct batadv_priv *bat_priv)
1192 uint8_t claim_dest[ETH_ALEN] = {0xff, 0x43, 0x05, 0x00, 0x00, 0x00};
1193 struct batadv_hard_iface *primary_if;
1195 unsigned long entrytime;
1197 spin_lock_init(&bat_priv->bla.bcast_duplist_lock);
1199 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hash registering\n");
1201 /* setting claim destination address */
1202 memcpy(&bat_priv->bla.claim_dest.magic, claim_dest, 3);
1203 bat_priv->bla.claim_dest.type = 0;
1204 primary_if = batadv_primary_if_get_selected(bat_priv);
1206 crc = crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN);
1207 bat_priv->bla.claim_dest.group = htons(crc);
1208 batadv_hardif_free_ref(primary_if);
1210 bat_priv->bla.claim_dest.group = 0; /* will be set later */
1213 /* initialize the duplicate list */
1214 entrytime = jiffies - msecs_to_jiffies(BATADV_DUPLIST_TIMEOUT);
1215 for (i = 0; i < BATADV_DUPLIST_SIZE; i++)
1216 bat_priv->bla.bcast_duplist[i].entrytime = entrytime;
1217 bat_priv->bla.bcast_duplist_curr = 0;
1219 if (bat_priv->bla.claim_hash)
1222 bat_priv->bla.claim_hash = batadv_hash_new(128);
1223 bat_priv->bla.backbone_hash = batadv_hash_new(32);
1225 if (!bat_priv->bla.claim_hash || !bat_priv->bla.backbone_hash)
1228 batadv_hash_set_lock_class(bat_priv->bla.claim_hash,
1229 &batadv_claim_hash_lock_class_key);
1230 batadv_hash_set_lock_class(bat_priv->bla.backbone_hash,
1231 &batadv_backbone_hash_lock_class_key);
1233 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hashes initialized\n");
1235 INIT_DELAYED_WORK(&bat_priv->bla.work, batadv_bla_periodic_work);
1237 queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work,
1238 msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH));
1243 * batadv_bla_check_bcast_duplist
1244 * @bat_priv: the bat priv with all the soft interface information
1245 * @skb: contains the bcast_packet to be checked
1247 * check if it is on our broadcast list. Another gateway might
1248 * have sent the same packet because it is connected to the same backbone,
1249 * so we have to remove this duplicate.
1251 * This is performed by checking the CRC, which will tell us
1252 * with a good chance that it is the same packet. If it is furthermore
1253 * sent by another host, drop it. We allow equal packets from
1254 * the same host however as this might be intended.
1256 int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
1257 struct sk_buff *skb)
1259 int i, curr, ret = 0;
1261 struct batadv_bcast_packet *bcast_packet;
1262 struct batadv_bcast_duplist_entry *entry;
1264 bcast_packet = (struct batadv_bcast_packet *)skb->data;
1266 /* calculate the crc ... */
1267 crc = batadv_skb_crc32(skb, (u8 *)(bcast_packet + 1));
1269 spin_lock_bh(&bat_priv->bla.bcast_duplist_lock);
1271 for (i = 0; i < BATADV_DUPLIST_SIZE; i++) {
1272 curr = (bat_priv->bla.bcast_duplist_curr + i);
1273 curr %= BATADV_DUPLIST_SIZE;
1274 entry = &bat_priv->bla.bcast_duplist[curr];
1276 /* we can stop searching if the entry is too old ;
1277 * later entries will be even older
1279 if (batadv_has_timed_out(entry->entrytime,
1280 BATADV_DUPLIST_TIMEOUT))
1283 if (entry->crc != crc)
1286 if (batadv_compare_eth(entry->orig, bcast_packet->orig))
1289 /* this entry seems to match: same crc, not too old,
1290 * and from another gw. therefore return 1 to forbid it.
1295 /* not found, add a new entry (overwrite the oldest entry)
1296 * and allow it, its the first occurence.
1298 curr = (bat_priv->bla.bcast_duplist_curr + BATADV_DUPLIST_SIZE - 1);
1299 curr %= BATADV_DUPLIST_SIZE;
1300 entry = &bat_priv->bla.bcast_duplist[curr];
1302 entry->entrytime = jiffies;
1303 memcpy(entry->orig, bcast_packet->orig, ETH_ALEN);
1304 bat_priv->bla.bcast_duplist_curr = curr;
1307 spin_unlock_bh(&bat_priv->bla.bcast_duplist_lock);
1314 /* @bat_priv: the bat priv with all the soft interface information
1315 * @orig: originator mac address
1317 * check if the originator is a gateway for any VLAN ID.
1319 * returns 1 if it is found, 0 otherwise
1321 int batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, uint8_t *orig)
1323 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
1324 struct hlist_head *head;
1325 struct hlist_node *node;
1326 struct batadv_bla_backbone_gw *backbone_gw;
1329 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1335 for (i = 0; i < hash->size; i++) {
1336 head = &hash->table[i];
1339 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1340 if (batadv_compare_eth(backbone_gw->orig, orig)) {
1353 * batadv_bla_is_backbone_gw
1354 * @skb: the frame to be checked
1355 * @orig_node: the orig_node of the frame
1356 * @hdr_size: maximum length of the frame
1358 * bla_is_backbone_gw inspects the skb for the VLAN ID and returns 1
1359 * if the orig_node is also a gateway on the soft interface, otherwise it
1362 int batadv_bla_is_backbone_gw(struct sk_buff *skb,
1363 struct batadv_orig_node *orig_node, int hdr_size)
1365 struct ethhdr *ethhdr;
1366 struct vlan_ethhdr *vhdr;
1367 struct batadv_bla_backbone_gw *backbone_gw;
1370 if (!atomic_read(&orig_node->bat_priv->bridge_loop_avoidance))
1373 /* first, find out the vid. */
1374 if (!pskb_may_pull(skb, hdr_size + ETH_HLEN))
1377 ethhdr = (struct ethhdr *)(((uint8_t *)skb->data) + hdr_size);
1379 if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) {
1380 if (!pskb_may_pull(skb, hdr_size + sizeof(struct vlan_ethhdr)))
1383 vhdr = (struct vlan_ethhdr *)(skb->data + hdr_size);
1384 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
1387 /* see if this originator is a backbone gw for this VLAN */
1388 backbone_gw = batadv_backbone_hash_find(orig_node->bat_priv,
1389 orig_node->orig, vid);
1393 batadv_backbone_gw_free_ref(backbone_gw);
1397 /* free all bla structures (for softinterface free or module unload) */
1398 void batadv_bla_free(struct batadv_priv *bat_priv)
1400 struct batadv_hard_iface *primary_if;
1402 cancel_delayed_work_sync(&bat_priv->bla.work);
1403 primary_if = batadv_primary_if_get_selected(bat_priv);
1405 if (bat_priv->bla.claim_hash) {
1406 batadv_bla_purge_claims(bat_priv, primary_if, 1);
1407 batadv_hash_destroy(bat_priv->bla.claim_hash);
1408 bat_priv->bla.claim_hash = NULL;
1410 if (bat_priv->bla.backbone_hash) {
1411 batadv_bla_purge_backbone_gw(bat_priv, 1);
1412 batadv_hash_destroy(bat_priv->bla.backbone_hash);
1413 bat_priv->bla.backbone_hash = NULL;
1416 batadv_hardif_free_ref(primary_if);
1421 * @bat_priv: the bat priv with all the soft interface information
1422 * @skb: the frame to be checked
1423 * @vid: the VLAN ID of the frame
1424 * @is_bcast: the packet came in a broadcast packet type.
1426 * bla_rx avoidance checks if:
1427 * * we have to race for a claim
1428 * * if the frame is allowed on the LAN
1430 * in these cases, the skb is further handled by this function and
1431 * returns 1, otherwise it returns 0 and the caller shall further
1434 int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, short vid,
1437 struct ethhdr *ethhdr;
1438 struct batadv_bla_claim search_claim, *claim = NULL;
1439 struct batadv_hard_iface *primary_if;
1442 ethhdr = (struct ethhdr *)skb_mac_header(skb);
1444 primary_if = batadv_primary_if_get_selected(bat_priv);
1448 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1452 if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
1453 /* don't allow broadcasts while requests are in flight */
1454 if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast)
1457 memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN);
1458 search_claim.vid = vid;
1459 claim = batadv_claim_hash_find(bat_priv, &search_claim);
1462 /* possible optimization: race for a claim */
1463 /* No claim exists yet, claim it for us!
1465 batadv_handle_claim(bat_priv, primary_if,
1466 primary_if->net_dev->dev_addr,
1467 ethhdr->h_source, vid);
1471 /* if it is our own claim ... */
1472 if (batadv_compare_eth(claim->backbone_gw->orig,
1473 primary_if->net_dev->dev_addr)) {
1474 /* ... allow it in any case */
1475 claim->lasttime = jiffies;
1479 /* if it is a broadcast ... */
1480 if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) {
1481 /* ... drop it. the responsible gateway is in charge.
1483 * We need to check is_bcast because with the gateway
1484 * feature, broadcasts (like DHCP requests) may be sent
1485 * using a unicast packet type.
1489 /* seems the client considers us as its best gateway.
1490 * send a claim and update the claim table
1493 batadv_handle_claim(bat_priv, primary_if,
1494 primary_if->net_dev->dev_addr,
1495 ethhdr->h_source, vid);
1499 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
1509 batadv_hardif_free_ref(primary_if);
1511 batadv_claim_free_ref(claim);
1517 * @bat_priv: the bat priv with all the soft interface information
1518 * @skb: the frame to be checked
1519 * @vid: the VLAN ID of the frame
1522 * * a claim was received which has to be processed
1523 * * the frame is allowed on the mesh
1525 * in these cases, the skb is further handled by this function and
1526 * returns 1, otherwise it returns 0 and the caller shall further
1529 int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, short vid)
1531 struct ethhdr *ethhdr;
1532 struct batadv_bla_claim search_claim, *claim = NULL;
1533 struct batadv_hard_iface *primary_if;
1536 primary_if = batadv_primary_if_get_selected(bat_priv);
1540 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1543 /* in VLAN case, the mac header might not be set. */
1544 skb_reset_mac_header(skb);
1546 if (batadv_bla_process_claim(bat_priv, primary_if, skb))
1549 ethhdr = (struct ethhdr *)skb_mac_header(skb);
1551 if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
1552 /* don't allow broadcasts while requests are in flight */
1553 if (is_multicast_ether_addr(ethhdr->h_dest))
1556 memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN);
1557 search_claim.vid = vid;
1559 claim = batadv_claim_hash_find(bat_priv, &search_claim);
1561 /* if no claim exists, allow it. */
1565 /* check if we are responsible. */
1566 if (batadv_compare_eth(claim->backbone_gw->orig,
1567 primary_if->net_dev->dev_addr)) {
1568 /* if yes, the client has roamed and we have
1571 batadv_handle_unclaim(bat_priv, primary_if,
1572 primary_if->net_dev->dev_addr,
1573 ethhdr->h_source, vid);
1577 /* check if it is a multicast/broadcast frame */
1578 if (is_multicast_ether_addr(ethhdr->h_dest)) {
1579 /* drop it. the responsible gateway has forwarded it into
1580 * the backbone network.
1584 /* we must allow it. at least if we are
1585 * responsible for the DESTINATION.
1590 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
1597 batadv_hardif_free_ref(primary_if);
1599 batadv_claim_free_ref(claim);
1603 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
1605 struct net_device *net_dev = (struct net_device *)seq->private;
1606 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1607 struct batadv_hashtable *hash = bat_priv->bla.claim_hash;
1608 struct batadv_bla_claim *claim;
1609 struct batadv_hard_iface *primary_if;
1610 struct hlist_node *node;
1611 struct hlist_head *head;
1614 uint8_t *primary_addr;
1616 primary_if = batadv_seq_print_text_primary_if_get(seq);
1620 primary_addr = primary_if->net_dev->dev_addr;
1622 "Claims announced for the mesh %s (orig %pM, group id %#.4x)\n",
1623 net_dev->name, primary_addr,
1624 ntohs(bat_priv->bla.claim_dest.group));
1625 seq_printf(seq, " %-17s %-5s %-17s [o] (%-6s)\n",
1626 "Client", "VID", "Originator", "CRC");
1627 for (i = 0; i < hash->size; i++) {
1628 head = &hash->table[i];
1631 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
1632 is_own = batadv_compare_eth(claim->backbone_gw->orig,
1634 seq_printf(seq, " * %pM on % 5d by %pM [%c] (%#.4x)\n",
1635 claim->addr, claim->vid,
1636 claim->backbone_gw->orig,
1637 (is_own ? 'x' : ' '),
1638 claim->backbone_gw->crc);
1644 batadv_hardif_free_ref(primary_if);
1648 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
1650 struct net_device *net_dev = (struct net_device *)seq->private;
1651 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1652 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
1653 struct batadv_bla_backbone_gw *backbone_gw;
1654 struct batadv_hard_iface *primary_if;
1655 struct hlist_node *node;
1656 struct hlist_head *head;
1660 uint8_t *primary_addr;
1662 primary_if = batadv_seq_print_text_primary_if_get(seq);
1666 primary_addr = primary_if->net_dev->dev_addr;
1668 "Backbones announced for the mesh %s (orig %pM, group id %#.4x)\n",
1669 net_dev->name, primary_addr,
1670 ntohs(bat_priv->bla.claim_dest.group));
1671 seq_printf(seq, " %-17s %-5s %-9s (%-6s)\n",
1672 "Originator", "VID", "last seen", "CRC");
1673 for (i = 0; i < hash->size; i++) {
1674 head = &hash->table[i];
1677 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1678 msecs = jiffies_to_msecs(jiffies -
1679 backbone_gw->lasttime);
1680 secs = msecs / 1000;
1681 msecs = msecs % 1000;
1683 is_own = batadv_compare_eth(backbone_gw->orig,
1689 " * %pM on % 5d % 4i.%03is (%#.4x)\n",
1690 backbone_gw->orig, backbone_gw->vid,
1691 secs, msecs, backbone_gw->crc);
1697 batadv_hardif_free_ref(primary_if);