1 /* Copyright (C) 2011-2012 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);
37 static void batadv_bla_send_announce(struct batadv_priv *bat_priv,
38 struct batadv_backbone_gw *backbone_gw);
40 /* return the index of the claim */
41 static inline uint32_t batadv_choose_claim(const void *data, uint32_t size)
43 struct batadv_claim *claim = (struct batadv_claim *)data;
46 hash = batadv_hash_bytes(hash, &claim->addr, sizeof(claim->addr));
47 hash = batadv_hash_bytes(hash, &claim->vid, sizeof(claim->vid));
56 /* return the index of the backbone gateway */
57 static inline uint32_t batadv_choose_backbone_gw(const void *data,
60 struct batadv_claim *claim = (struct batadv_claim *)data;
63 hash = batadv_hash_bytes(hash, &claim->addr, sizeof(claim->addr));
64 hash = batadv_hash_bytes(hash, &claim->vid, sizeof(claim->vid));
74 /* compares address and vid of two backbone gws */
75 static int batadv_compare_backbone_gw(const struct hlist_node *node,
78 const void *data1 = container_of(node, struct batadv_backbone_gw,
80 const struct batadv_backbone_gw *gw1 = data1, *gw2 = data2;
82 if (!batadv_compare_eth(gw1->orig, gw2->orig))
85 if (gw1->vid != gw2->vid)
91 /* compares address and vid of two claims */
92 static int batadv_compare_claim(const struct hlist_node *node,
95 const void *data1 = container_of(node, struct batadv_claim,
97 const struct batadv_claim *cl1 = data1, *cl2 = data2;
99 if (!batadv_compare_eth(cl1->addr, cl2->addr))
102 if (cl1->vid != cl2->vid)
108 /* free a backbone gw */
109 static void batadv_backbone_gw_free_ref(struct batadv_backbone_gw *backbone_gw)
111 if (atomic_dec_and_test(&backbone_gw->refcount))
112 kfree_rcu(backbone_gw, rcu);
115 /* finally deinitialize the claim */
116 static void batadv_claim_free_rcu(struct rcu_head *rcu)
118 struct batadv_claim *claim;
120 claim = container_of(rcu, struct batadv_claim, rcu);
122 batadv_backbone_gw_free_ref(claim->backbone_gw);
126 /* free a claim, call claim_free_rcu if its the last reference */
127 static void batadv_claim_free_ref(struct batadv_claim *claim)
129 if (atomic_dec_and_test(&claim->refcount))
130 call_rcu(&claim->rcu, batadv_claim_free_rcu);
133 /* @bat_priv: the bat priv with all the soft interface information
134 * @data: search data (may be local/static data)
136 * looks for a claim in the hash, and returns it if found
139 static struct batadv_claim *batadv_claim_hash_find(struct batadv_priv *bat_priv,
140 struct batadv_claim *data)
142 struct batadv_hashtable *hash = bat_priv->bla.claim_hash;
143 struct hlist_head *head;
144 struct hlist_node *node;
145 struct batadv_claim *claim;
146 struct batadv_claim *claim_tmp = NULL;
152 index = batadv_choose_claim(data, hash->size);
153 head = &hash->table[index];
156 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
157 if (!batadv_compare_claim(&claim->hash_entry, data))
160 if (!atomic_inc_not_zero(&claim->refcount))
172 * batadv_backbone_hash_find - looks for a claim in the hash
173 * @bat_priv: the bat priv with all the soft interface information
174 * @addr: the address of the originator
177 * Returns claim if found or NULL otherwise.
179 static struct batadv_backbone_gw *
180 batadv_backbone_hash_find(struct batadv_priv *bat_priv,
181 uint8_t *addr, short vid)
183 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
184 struct hlist_head *head;
185 struct hlist_node *node;
186 struct batadv_backbone_gw search_entry, *backbone_gw;
187 struct batadv_backbone_gw *backbone_gw_tmp = NULL;
193 memcpy(search_entry.orig, addr, ETH_ALEN);
194 search_entry.vid = vid;
196 index = batadv_choose_backbone_gw(&search_entry, hash->size);
197 head = &hash->table[index];
200 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
201 if (!batadv_compare_backbone_gw(&backbone_gw->hash_entry,
205 if (!atomic_inc_not_zero(&backbone_gw->refcount))
208 backbone_gw_tmp = backbone_gw;
213 return backbone_gw_tmp;
216 /* delete all claims for a backbone */
218 batadv_bla_del_backbone_claims(struct batadv_backbone_gw *backbone_gw)
220 struct batadv_hashtable *hash;
221 struct hlist_node *node, *node_tmp;
222 struct hlist_head *head;
223 struct batadv_claim *claim;
225 spinlock_t *list_lock; /* protects write access to the hash lists */
227 hash = backbone_gw->bat_priv->bla.claim_hash;
231 for (i = 0; i < hash->size; i++) {
232 head = &hash->table[i];
233 list_lock = &hash->list_locks[i];
235 spin_lock_bh(list_lock);
236 hlist_for_each_entry_safe(claim, node, node_tmp,
239 if (claim->backbone_gw != backbone_gw)
242 batadv_claim_free_ref(claim);
245 spin_unlock_bh(list_lock);
248 /* all claims gone, intialize CRC */
249 backbone_gw->crc = BATADV_BLA_CRC_INIT;
253 * batadv_bla_send_claim - sends a claim frame according to the provided info
254 * @bat_priv: the bat priv with all the soft interface information
255 * @orig: the mac address to be announced within the claim
257 * @claimtype: the type of the claim (CLAIM, UNCLAIM, ANNOUNCE, ...)
259 static void batadv_bla_send_claim(struct batadv_priv *bat_priv, uint8_t *mac,
260 short vid, int claimtype)
263 struct ethhdr *ethhdr;
264 struct batadv_hard_iface *primary_if;
265 struct net_device *soft_iface;
267 struct batadv_bla_claim_dst local_claim_dest;
270 primary_if = batadv_primary_if_get_selected(bat_priv);
274 memcpy(&local_claim_dest, &bat_priv->bla.claim_dest,
275 sizeof(local_claim_dest));
276 local_claim_dest.type = claimtype;
278 soft_iface = primary_if->soft_iface;
280 skb = arp_create(ARPOP_REPLY, ETH_P_ARP,
281 /* IP DST: 0.0.0.0 */
283 primary_if->soft_iface,
284 /* IP SRC: 0.0.0.0 */
286 /* Ethernet DST: Broadcast */
288 /* Ethernet SRC/HW SRC: originator mac */
289 primary_if->net_dev->dev_addr,
290 /* HW DST: FF:43:05:XX:YY:YY
291 * with XX = claim type
292 * and YY:YY = group id
294 (uint8_t *)&local_claim_dest);
299 ethhdr = (struct ethhdr *)skb->data;
300 hw_src = (uint8_t *)ethhdr + ETH_HLEN + sizeof(struct arphdr);
302 /* now we pretend that the client would have sent this ... */
304 case BATADV_CLAIM_TYPE_CLAIM:
305 /* normal claim frame
306 * set Ethernet SRC to the clients mac
308 memcpy(ethhdr->h_source, mac, ETH_ALEN);
309 batadv_dbg(BATADV_DBG_BLA, bat_priv,
310 "bla_send_claim(): CLAIM %pM on vid %d\n", mac, vid);
312 case BATADV_CLAIM_TYPE_UNCLAIM:
314 * set HW SRC to the clients mac
316 memcpy(hw_src, mac, ETH_ALEN);
317 batadv_dbg(BATADV_DBG_BLA, bat_priv,
318 "bla_send_claim(): UNCLAIM %pM on vid %d\n", mac,
321 case BATADV_CLAIM_TYPE_ANNOUNCE:
322 /* announcement frame
323 * set HW SRC to the special mac containg the crc
325 memcpy(hw_src, mac, ETH_ALEN);
326 batadv_dbg(BATADV_DBG_BLA, bat_priv,
327 "bla_send_claim(): ANNOUNCE of %pM on vid %d\n",
328 ethhdr->h_source, vid);
330 case BATADV_CLAIM_TYPE_REQUEST:
332 * set HW SRC and header destination to the receiving backbone
335 memcpy(hw_src, mac, ETH_ALEN);
336 memcpy(ethhdr->h_dest, mac, ETH_ALEN);
337 batadv_dbg(BATADV_DBG_BLA, bat_priv,
338 "bla_send_claim(): REQUEST of %pM to %pMon vid %d\n",
339 ethhdr->h_source, ethhdr->h_dest, vid);
345 skb = vlan_insert_tag(skb, vid);
347 skb_reset_mac_header(skb);
348 skb->protocol = eth_type_trans(skb, soft_iface);
349 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
350 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
351 skb->len + ETH_HLEN);
352 soft_iface->last_rx = jiffies;
357 batadv_hardif_free_ref(primary_if);
361 * batadv_bla_get_backbone_gw
362 * @bat_priv: the bat priv with all the soft interface information
363 * @orig: the mac address of the originator
366 * searches for the backbone gw or creates a new one if it could not
369 static struct batadv_backbone_gw *
370 batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, uint8_t *orig,
371 short vid, bool own_backbone)
373 struct batadv_backbone_gw *entry;
374 struct batadv_orig_node *orig_node;
377 entry = batadv_backbone_hash_find(bat_priv, orig, vid);
382 batadv_dbg(BATADV_DBG_BLA, bat_priv,
383 "bla_get_backbone_gw(): not found (%pM, %d), creating new entry\n",
386 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
391 entry->lasttime = jiffies;
392 entry->crc = BATADV_BLA_CRC_INIT;
393 entry->bat_priv = bat_priv;
394 atomic_set(&entry->request_sent, 0);
395 atomic_set(&entry->wait_periods, 0);
396 memcpy(entry->orig, orig, ETH_ALEN);
398 /* one for the hash, one for returning */
399 atomic_set(&entry->refcount, 2);
401 hash_added = batadv_hash_add(bat_priv->bla.backbone_hash,
402 batadv_compare_backbone_gw,
403 batadv_choose_backbone_gw, entry,
406 if (unlikely(hash_added != 0)) {
407 /* hash failed, free the structure */
412 /* this is a gateway now, remove any tt entries */
413 orig_node = batadv_orig_hash_find(bat_priv, orig);
415 batadv_tt_global_del_orig(bat_priv, orig_node,
416 "became a backbone gateway");
417 batadv_orig_node_free_ref(orig_node);
421 batadv_bla_send_announce(bat_priv, entry);
423 /* this will be decreased in the worker thread */
424 atomic_inc(&entry->request_sent);
425 atomic_set(&entry->wait_periods, BATADV_BLA_WAIT_PERIODS);
426 atomic_inc(&bat_priv->bla.num_requests);
432 /* update or add the own backbone gw to make sure we announce
433 * where we receive other backbone gws
436 batadv_bla_update_own_backbone_gw(struct batadv_priv *bat_priv,
437 struct batadv_hard_iface *primary_if,
440 struct batadv_backbone_gw *backbone_gw;
442 backbone_gw = batadv_bla_get_backbone_gw(bat_priv,
443 primary_if->net_dev->dev_addr,
445 if (unlikely(!backbone_gw))
448 backbone_gw->lasttime = jiffies;
449 batadv_backbone_gw_free_ref(backbone_gw);
452 /* @bat_priv: the bat priv with all the soft interface information
453 * @vid: the vid where the request came on
455 * Repeat all of our own claims, and finally send an ANNOUNCE frame
456 * to allow the requester another check if the CRC is correct now.
458 static void batadv_bla_answer_request(struct batadv_priv *bat_priv,
459 struct batadv_hard_iface *primary_if,
462 struct hlist_node *node;
463 struct hlist_head *head;
464 struct batadv_hashtable *hash;
465 struct batadv_claim *claim;
466 struct batadv_backbone_gw *backbone_gw;
469 batadv_dbg(BATADV_DBG_BLA, bat_priv,
470 "bla_answer_request(): received a claim request, send all of our own claims again\n");
472 backbone_gw = batadv_backbone_hash_find(bat_priv,
473 primary_if->net_dev->dev_addr,
478 hash = bat_priv->bla.claim_hash;
479 for (i = 0; i < hash->size; i++) {
480 head = &hash->table[i];
483 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
484 /* only own claims are interesting */
485 if (claim->backbone_gw != backbone_gw)
488 batadv_bla_send_claim(bat_priv, claim->addr, claim->vid,
489 BATADV_CLAIM_TYPE_CLAIM);
494 /* finally, send an announcement frame */
495 batadv_bla_send_announce(bat_priv, backbone_gw);
496 batadv_backbone_gw_free_ref(backbone_gw);
499 /* @backbone_gw: the backbone gateway from whom we are out of sync
501 * When the crc is wrong, ask the backbone gateway for a full table update.
502 * After the request, it will repeat all of his own claims and finally
503 * send an announcement claim with which we can check again.
505 static void batadv_bla_send_request(struct batadv_backbone_gw *backbone_gw)
507 /* first, remove all old entries */
508 batadv_bla_del_backbone_claims(backbone_gw);
510 batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
511 "Sending REQUEST to %pM\n", backbone_gw->orig);
514 batadv_bla_send_claim(backbone_gw->bat_priv, backbone_gw->orig,
515 backbone_gw->vid, BATADV_CLAIM_TYPE_REQUEST);
517 /* no local broadcasts should be sent or received, for now. */
518 if (!atomic_read(&backbone_gw->request_sent)) {
519 atomic_inc(&backbone_gw->bat_priv->bla.num_requests);
520 atomic_set(&backbone_gw->request_sent, 1);
524 /* @bat_priv: the bat priv with all the soft interface information
525 * @backbone_gw: our backbone gateway which should be announced
527 * This function sends an announcement. It is called from multiple
530 static void batadv_bla_send_announce(struct batadv_priv *bat_priv,
531 struct batadv_backbone_gw *backbone_gw)
533 uint8_t mac[ETH_ALEN];
536 memcpy(mac, batadv_announce_mac, 4);
537 crc = htons(backbone_gw->crc);
538 memcpy(&mac[4], &crc, 2);
540 batadv_bla_send_claim(bat_priv, mac, backbone_gw->vid,
541 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_backbone_gw *backbone_gw)
556 struct batadv_claim *claim;
557 struct batadv_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);
603 /* set (new) backbone gw */
604 atomic_inc(&backbone_gw->refcount);
605 claim->backbone_gw = backbone_gw;
607 backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
608 backbone_gw->lasttime = jiffies;
611 batadv_claim_free_ref(claim);
614 /* Delete a claim from the claim hash which has the
615 * given mac address and vid.
617 static void batadv_bla_del_claim(struct batadv_priv *bat_priv,
618 const uint8_t *mac, const short vid)
620 struct batadv_claim search_claim, *claim;
622 memcpy(search_claim.addr, mac, ETH_ALEN);
623 search_claim.vid = vid;
624 claim = batadv_claim_hash_find(bat_priv, &search_claim);
628 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_del_claim(): %pM, vid %d\n",
631 batadv_hash_remove(bat_priv->bla.claim_hash, batadv_compare_claim,
632 batadv_choose_claim, claim);
633 batadv_claim_free_ref(claim); /* reference from the hash is gone */
635 claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN);
637 /* don't need the reference from hash_find() anymore */
638 batadv_claim_free_ref(claim);
641 /* check for ANNOUNCE frame, return 1 if handled */
642 static int batadv_handle_announce(struct batadv_priv *bat_priv,
643 uint8_t *an_addr, uint8_t *backbone_addr,
646 struct batadv_backbone_gw *backbone_gw;
649 if (memcmp(an_addr, batadv_announce_mac, 4) != 0)
652 backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid,
655 if (unlikely(!backbone_gw))
659 /* handle as ANNOUNCE frame */
660 backbone_gw->lasttime = jiffies;
661 crc = ntohs(*((__be16 *)(&an_addr[4])));
663 batadv_dbg(BATADV_DBG_BLA, bat_priv,
664 "handle_announce(): ANNOUNCE vid %d (sent by %pM)... CRC = %04x\n",
665 vid, backbone_gw->orig, crc);
667 if (backbone_gw->crc != crc) {
668 batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
669 "handle_announce(): CRC FAILED for %pM/%d (my = %04x, sent = %04x)\n",
670 backbone_gw->orig, backbone_gw->vid,
671 backbone_gw->crc, crc);
673 batadv_bla_send_request(backbone_gw);
675 /* if we have sent a request and the crc was OK,
676 * we can allow traffic again.
678 if (atomic_read(&backbone_gw->request_sent)) {
679 atomic_dec(&backbone_gw->bat_priv->bla.num_requests);
680 atomic_set(&backbone_gw->request_sent, 0);
684 batadv_backbone_gw_free_ref(backbone_gw);
688 /* check for REQUEST frame, return 1 if handled */
689 static int batadv_handle_request(struct batadv_priv *bat_priv,
690 struct batadv_hard_iface *primary_if,
691 uint8_t *backbone_addr,
692 struct ethhdr *ethhdr, short vid)
694 /* check for REQUEST frame */
695 if (!batadv_compare_eth(backbone_addr, ethhdr->h_dest))
698 /* sanity check, this should not happen on a normal switch,
699 * we ignore it in this case.
701 if (!batadv_compare_eth(ethhdr->h_dest, primary_if->net_dev->dev_addr))
704 batadv_dbg(BATADV_DBG_BLA, bat_priv,
705 "handle_request(): REQUEST vid %d (sent by %pM)...\n",
706 vid, ethhdr->h_source);
708 batadv_bla_answer_request(bat_priv, primary_if, vid);
712 /* check for UNCLAIM frame, return 1 if handled */
713 static int batadv_handle_unclaim(struct batadv_priv *bat_priv,
714 struct batadv_hard_iface *primary_if,
715 uint8_t *backbone_addr,
716 uint8_t *claim_addr, short vid)
718 struct batadv_backbone_gw *backbone_gw;
720 /* unclaim in any case if it is our own */
721 if (primary_if && batadv_compare_eth(backbone_addr,
722 primary_if->net_dev->dev_addr))
723 batadv_bla_send_claim(bat_priv, claim_addr, vid,
724 BATADV_CLAIM_TYPE_UNCLAIM);
726 backbone_gw = batadv_backbone_hash_find(bat_priv, backbone_addr, vid);
731 /* this must be an UNCLAIM frame */
732 batadv_dbg(BATADV_DBG_BLA, bat_priv,
733 "handle_unclaim(): UNCLAIM %pM on vid %d (sent by %pM)...\n",
734 claim_addr, vid, backbone_gw->orig);
736 batadv_bla_del_claim(bat_priv, claim_addr, vid);
737 batadv_backbone_gw_free_ref(backbone_gw);
741 /* check for CLAIM frame, return 1 if handled */
742 static int batadv_handle_claim(struct batadv_priv *bat_priv,
743 struct batadv_hard_iface *primary_if,
744 uint8_t *backbone_addr, uint8_t *claim_addr,
747 struct batadv_backbone_gw *backbone_gw;
749 /* register the gateway if not yet available, and add the claim. */
751 backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid,
754 if (unlikely(!backbone_gw))
757 /* this must be a CLAIM frame */
758 batadv_bla_add_claim(bat_priv, claim_addr, vid, backbone_gw);
759 if (batadv_compare_eth(backbone_addr, primary_if->net_dev->dev_addr))
760 batadv_bla_send_claim(bat_priv, claim_addr, vid,
761 BATADV_CLAIM_TYPE_CLAIM);
763 /* TODO: we could call something like tt_local_del() here. */
765 batadv_backbone_gw_free_ref(backbone_gw);
770 * batadv_check_claim_group
771 * @bat_priv: the bat priv with all the soft interface information
772 * @hw_src: the Hardware source in the ARP Header
773 * @hw_dst: the Hardware destination in the ARP Header
774 * @ethhdr: pointer to the Ethernet header of the claim frame
776 * checks if it is a claim packet and if its on the same group.
777 * This function also applies the group ID of the sender
778 * if it is in the same mesh.
781 * 2 - if it is a claim packet and on the same group
782 * 1 - if is a claim packet from another group
783 * 0 - if it is not a claim packet
785 static int batadv_check_claim_group(struct batadv_priv *bat_priv,
786 struct batadv_hard_iface *primary_if,
787 uint8_t *hw_src, uint8_t *hw_dst,
788 struct ethhdr *ethhdr)
790 uint8_t *backbone_addr;
791 struct batadv_orig_node *orig_node;
792 struct batadv_bla_claim_dst *bla_dst, *bla_dst_own;
794 bla_dst = (struct batadv_bla_claim_dst *)hw_dst;
795 bla_dst_own = &bat_priv->bla.claim_dest;
797 /* check if it is a claim packet in general */
798 if (memcmp(bla_dst->magic, bla_dst_own->magic,
799 sizeof(bla_dst->magic)) != 0)
802 /* if announcement packet, use the source,
803 * otherwise assume it is in the hw_src
805 switch (bla_dst->type) {
806 case BATADV_CLAIM_TYPE_CLAIM:
807 backbone_addr = hw_src;
809 case BATADV_CLAIM_TYPE_REQUEST:
810 case BATADV_CLAIM_TYPE_ANNOUNCE:
811 case BATADV_CLAIM_TYPE_UNCLAIM:
812 backbone_addr = ethhdr->h_source;
818 /* don't accept claim frames from ourselves */
819 if (batadv_compare_eth(backbone_addr, primary_if->net_dev->dev_addr))
822 /* if its already the same group, it is fine. */
823 if (bla_dst->group == bla_dst_own->group)
826 /* lets see if this originator is in our mesh */
827 orig_node = batadv_orig_hash_find(bat_priv, backbone_addr);
829 /* dont accept claims from gateways which are not in
830 * the same mesh or group.
835 /* if our mesh friends mac is bigger, use it for ourselves. */
836 if (ntohs(bla_dst->group) > ntohs(bla_dst_own->group)) {
837 batadv_dbg(BATADV_DBG_BLA, bat_priv,
838 "taking other backbones claim group: %04x\n",
839 ntohs(bla_dst->group));
840 bla_dst_own->group = bla_dst->group;
843 batadv_orig_node_free_ref(orig_node);
849 /* @bat_priv: the bat priv with all the soft interface information
850 * @skb: the frame to be checked
852 * Check if this is a claim frame, and process it accordingly.
854 * returns 1 if it was a claim frame, otherwise return 0 to
855 * tell the callee that it can use the frame on its own.
857 static int batadv_bla_process_claim(struct batadv_priv *bat_priv,
858 struct batadv_hard_iface *primary_if,
861 struct ethhdr *ethhdr;
862 struct vlan_ethhdr *vhdr;
863 struct arphdr *arphdr;
864 uint8_t *hw_src, *hw_dst;
865 struct batadv_bla_claim_dst *bla_dst;
871 ethhdr = (struct ethhdr *)skb_mac_header(skb);
873 if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) {
874 vhdr = (struct vlan_ethhdr *)ethhdr;
875 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
876 proto = ntohs(vhdr->h_vlan_encapsulated_proto);
877 headlen = sizeof(*vhdr);
879 proto = ntohs(ethhdr->h_proto);
883 if (proto != ETH_P_ARP)
884 return 0; /* not a claim frame */
886 /* this must be a ARP frame. check if it is a claim. */
888 if (unlikely(!pskb_may_pull(skb, headlen + arp_hdr_len(skb->dev))))
891 /* pskb_may_pull() may have modified the pointers, get ethhdr again */
892 ethhdr = (struct ethhdr *)skb_mac_header(skb);
893 arphdr = (struct arphdr *)((uint8_t *)ethhdr + headlen);
895 /* Check whether the ARP frame carries a valid
898 if (arphdr->ar_hrd != htons(ARPHRD_ETHER))
900 if (arphdr->ar_pro != htons(ETH_P_IP))
902 if (arphdr->ar_hln != ETH_ALEN)
904 if (arphdr->ar_pln != 4)
907 hw_src = (uint8_t *)arphdr + sizeof(struct arphdr);
908 hw_dst = hw_src + ETH_ALEN + 4;
909 bla_dst = (struct batadv_bla_claim_dst *)hw_dst;
911 /* check if it is a claim frame. */
912 ret = batadv_check_claim_group(bat_priv, primary_if, hw_src, hw_dst,
915 batadv_dbg(BATADV_DBG_BLA, bat_priv,
916 "bla_process_claim(): received a claim frame from another group. From: %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n",
917 ethhdr->h_source, vid, hw_src, hw_dst);
922 /* become a backbone gw ourselves on this vlan if not happened yet */
923 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
925 /* check for the different types of claim frames ... */
926 switch (bla_dst->type) {
927 case BATADV_CLAIM_TYPE_CLAIM:
928 if (batadv_handle_claim(bat_priv, primary_if, hw_src,
929 ethhdr->h_source, vid))
932 case BATADV_CLAIM_TYPE_UNCLAIM:
933 if (batadv_handle_unclaim(bat_priv, primary_if,
934 ethhdr->h_source, hw_src, vid))
938 case BATADV_CLAIM_TYPE_ANNOUNCE:
939 if (batadv_handle_announce(bat_priv, hw_src, ethhdr->h_source,
943 case BATADV_CLAIM_TYPE_REQUEST:
944 if (batadv_handle_request(bat_priv, primary_if, hw_src, ethhdr,
950 batadv_dbg(BATADV_DBG_BLA, bat_priv,
951 "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",
952 ethhdr->h_source, vid, hw_src, hw_dst);
956 /* Check when we last heard from other nodes, and remove them in case of
957 * a time out, or clean all backbone gws if now is set.
959 static void batadv_bla_purge_backbone_gw(struct batadv_priv *bat_priv, int now)
961 struct batadv_backbone_gw *backbone_gw;
962 struct hlist_node *node, *node_tmp;
963 struct hlist_head *head;
964 struct batadv_hashtable *hash;
965 spinlock_t *list_lock; /* protects write access to the hash lists */
968 hash = bat_priv->bla.backbone_hash;
972 for (i = 0; i < hash->size; i++) {
973 head = &hash->table[i];
974 list_lock = &hash->list_locks[i];
976 spin_lock_bh(list_lock);
977 hlist_for_each_entry_safe(backbone_gw, node, node_tmp,
981 if (!batadv_has_timed_out(backbone_gw->lasttime,
982 BATADV_BLA_BACKBONE_TIMEOUT))
985 batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv,
986 "bla_purge_backbone_gw(): backbone gw %pM timed out\n",
990 /* don't wait for the pending request anymore */
991 if (atomic_read(&backbone_gw->request_sent))
992 atomic_dec(&bat_priv->bla.num_requests);
994 batadv_bla_del_backbone_claims(backbone_gw);
997 batadv_backbone_gw_free_ref(backbone_gw);
999 spin_unlock_bh(list_lock);
1004 * batadv_bla_purge_claims
1005 * @bat_priv: the bat priv with all the soft interface information
1006 * @primary_if: the selected primary interface, may be NULL if now is set
1007 * @now: whether the whole hash shall be wiped now
1009 * Check when we heard last time from our own claims, and remove them in case of
1010 * a time out, or clean all claims if now is set
1012 static void batadv_bla_purge_claims(struct batadv_priv *bat_priv,
1013 struct batadv_hard_iface *primary_if,
1016 struct batadv_claim *claim;
1017 struct hlist_node *node;
1018 struct hlist_head *head;
1019 struct batadv_hashtable *hash;
1022 hash = bat_priv->bla.claim_hash;
1026 for (i = 0; i < hash->size; i++) {
1027 head = &hash->table[i];
1030 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
1033 if (!batadv_compare_eth(claim->backbone_gw->orig,
1034 primary_if->net_dev->dev_addr))
1036 if (!batadv_has_timed_out(claim->lasttime,
1037 BATADV_BLA_CLAIM_TIMEOUT))
1040 batadv_dbg(BATADV_DBG_BLA, bat_priv,
1041 "bla_purge_claims(): %pM, vid %d, time out\n",
1042 claim->addr, claim->vid);
1045 batadv_handle_unclaim(bat_priv, primary_if,
1046 claim->backbone_gw->orig,
1047 claim->addr, claim->vid);
1054 * batadv_bla_update_orig_address
1055 * @bat_priv: the bat priv with all the soft interface information
1056 * @primary_if: the new selected primary_if
1057 * @oldif: the old primary interface, may be NULL
1059 * Update the backbone gateways when the own orig address changes.
1061 void batadv_bla_update_orig_address(struct batadv_priv *bat_priv,
1062 struct batadv_hard_iface *primary_if,
1063 struct batadv_hard_iface *oldif)
1065 struct batadv_backbone_gw *backbone_gw;
1066 struct hlist_node *node;
1067 struct hlist_head *head;
1068 struct batadv_hashtable *hash;
1072 /* reset bridge loop avoidance group id */
1073 group = htons(crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN));
1074 bat_priv->bla.claim_dest.group = group;
1077 batadv_bla_purge_claims(bat_priv, NULL, 1);
1078 batadv_bla_purge_backbone_gw(bat_priv, 1);
1082 hash = bat_priv->bla.backbone_hash;
1086 for (i = 0; i < hash->size; i++) {
1087 head = &hash->table[i];
1090 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1091 /* own orig still holds the old value. */
1092 if (!batadv_compare_eth(backbone_gw->orig,
1093 oldif->net_dev->dev_addr))
1096 memcpy(backbone_gw->orig,
1097 primary_if->net_dev->dev_addr, ETH_ALEN);
1098 /* send an announce frame so others will ask for our
1099 * claims and update their tables.
1101 batadv_bla_send_announce(bat_priv, backbone_gw);
1109 /* (re)start the timer */
1110 static void batadv_bla_start_timer(struct batadv_priv *bat_priv)
1112 INIT_DELAYED_WORK(&bat_priv->bla.work, batadv_bla_periodic_work);
1113 queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work,
1114 msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH));
1117 /* periodic work to do:
1118 * * purge structures when they are too old
1119 * * send announcements
1121 static void batadv_bla_periodic_work(struct work_struct *work)
1123 struct delayed_work *delayed_work;
1124 struct batadv_priv *bat_priv;
1125 struct batadv_priv_bla *priv_bla;
1126 struct hlist_node *node;
1127 struct hlist_head *head;
1128 struct batadv_backbone_gw *backbone_gw;
1129 struct batadv_hashtable *hash;
1130 struct batadv_hard_iface *primary_if;
1133 delayed_work = container_of(work, struct delayed_work, work);
1134 priv_bla = container_of(delayed_work, struct batadv_priv_bla, work);
1135 bat_priv = container_of(priv_bla, struct batadv_priv, bla);
1136 primary_if = batadv_primary_if_get_selected(bat_priv);
1140 batadv_bla_purge_claims(bat_priv, primary_if, 0);
1141 batadv_bla_purge_backbone_gw(bat_priv, 0);
1143 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1146 hash = bat_priv->bla.backbone_hash;
1150 for (i = 0; i < hash->size; i++) {
1151 head = &hash->table[i];
1154 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1155 if (!batadv_compare_eth(backbone_gw->orig,
1156 primary_if->net_dev->dev_addr))
1159 backbone_gw->lasttime = jiffies;
1161 batadv_bla_send_announce(bat_priv, backbone_gw);
1163 /* request_sent is only set after creation to avoid
1164 * problems when we are not yet known as backbone gw
1167 * We can reset this now after we waited some periods
1168 * to give bridge forward delays and bla group forming
1172 if (atomic_read(&backbone_gw->request_sent) == 0)
1175 if (!atomic_dec_and_test(&backbone_gw->wait_periods))
1178 atomic_dec(&backbone_gw->bat_priv->bla.num_requests);
1179 atomic_set(&backbone_gw->request_sent, 0);
1185 batadv_hardif_free_ref(primary_if);
1187 batadv_bla_start_timer(bat_priv);
1190 /* The hash for claim and backbone hash receive the same key because they
1191 * are getting initialized by hash_new with the same key. Reinitializing
1192 * them with to different keys to allow nested locking without generating
1195 static struct lock_class_key batadv_claim_hash_lock_class_key;
1196 static struct lock_class_key batadv_backbone_hash_lock_class_key;
1198 /* initialize all bla structures */
1199 int batadv_bla_init(struct batadv_priv *bat_priv)
1202 uint8_t claim_dest[ETH_ALEN] = {0xff, 0x43, 0x05, 0x00, 0x00, 0x00};
1203 struct batadv_hard_iface *primary_if;
1205 unsigned long entrytime;
1207 spin_lock_init(&bat_priv->bla.bcast_duplist_lock);
1209 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hash registering\n");
1211 /* setting claim destination address */
1212 memcpy(&bat_priv->bla.claim_dest.magic, claim_dest, 3);
1213 bat_priv->bla.claim_dest.type = 0;
1214 primary_if = batadv_primary_if_get_selected(bat_priv);
1216 crc = crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN);
1217 bat_priv->bla.claim_dest.group = htons(crc);
1218 batadv_hardif_free_ref(primary_if);
1220 bat_priv->bla.claim_dest.group = 0; /* will be set later */
1223 /* initialize the duplicate list */
1224 entrytime = jiffies - msecs_to_jiffies(BATADV_DUPLIST_TIMEOUT);
1225 for (i = 0; i < BATADV_DUPLIST_SIZE; i++)
1226 bat_priv->bla.bcast_duplist[i].entrytime = entrytime;
1227 bat_priv->bla.bcast_duplist_curr = 0;
1229 if (bat_priv->bla.claim_hash)
1232 bat_priv->bla.claim_hash = batadv_hash_new(128);
1233 bat_priv->bla.backbone_hash = batadv_hash_new(32);
1235 if (!bat_priv->bla.claim_hash || !bat_priv->bla.backbone_hash)
1238 batadv_hash_set_lock_class(bat_priv->bla.claim_hash,
1239 &batadv_claim_hash_lock_class_key);
1240 batadv_hash_set_lock_class(bat_priv->bla.backbone_hash,
1241 &batadv_backbone_hash_lock_class_key);
1243 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hashes initialized\n");
1245 batadv_bla_start_timer(bat_priv);
1250 * batadv_bla_check_bcast_duplist
1251 * @bat_priv: the bat priv with all the soft interface information
1252 * @skb: contains the bcast_packet to be checked
1254 * check if it is on our broadcast list. Another gateway might
1255 * have sent the same packet because it is connected to the same backbone,
1256 * so we have to remove this duplicate.
1258 * This is performed by checking the CRC, which will tell us
1259 * with a good chance that it is the same packet. If it is furthermore
1260 * sent by another host, drop it. We allow equal packets from
1261 * the same host however as this might be intended.
1263 int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
1264 struct sk_buff *skb)
1266 int i, curr, ret = 0;
1268 struct batadv_bcast_packet *bcast_packet;
1269 struct batadv_bcast_duplist_entry *entry;
1271 bcast_packet = (struct batadv_bcast_packet *)skb->data;
1273 /* calculate the crc ... */
1274 crc = batadv_skb_crc32(skb, (u8 *)(bcast_packet + 1));
1276 spin_lock_bh(&bat_priv->bla.bcast_duplist_lock);
1278 for (i = 0; i < BATADV_DUPLIST_SIZE; i++) {
1279 curr = (bat_priv->bla.bcast_duplist_curr + i);
1280 curr %= BATADV_DUPLIST_SIZE;
1281 entry = &bat_priv->bla.bcast_duplist[curr];
1283 /* we can stop searching if the entry is too old ;
1284 * later entries will be even older
1286 if (batadv_has_timed_out(entry->entrytime,
1287 BATADV_DUPLIST_TIMEOUT))
1290 if (entry->crc != crc)
1293 if (batadv_compare_eth(entry->orig, bcast_packet->orig))
1296 /* this entry seems to match: same crc, not too old,
1297 * and from another gw. therefore return 1 to forbid it.
1302 /* not found, add a new entry (overwrite the oldest entry)
1303 * and allow it, its the first occurence.
1305 curr = (bat_priv->bla.bcast_duplist_curr + BATADV_DUPLIST_SIZE - 1);
1306 curr %= BATADV_DUPLIST_SIZE;
1307 entry = &bat_priv->bla.bcast_duplist[curr];
1309 entry->entrytime = jiffies;
1310 memcpy(entry->orig, bcast_packet->orig, ETH_ALEN);
1311 bat_priv->bla.bcast_duplist_curr = curr;
1314 spin_unlock_bh(&bat_priv->bla.bcast_duplist_lock);
1321 /* @bat_priv: the bat priv with all the soft interface information
1322 * @orig: originator mac address
1324 * check if the originator is a gateway for any VLAN ID.
1326 * returns 1 if it is found, 0 otherwise
1328 int batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, uint8_t *orig)
1330 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
1331 struct hlist_head *head;
1332 struct hlist_node *node;
1333 struct batadv_backbone_gw *backbone_gw;
1336 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1342 for (i = 0; i < hash->size; i++) {
1343 head = &hash->table[i];
1346 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1347 if (batadv_compare_eth(backbone_gw->orig, orig)) {
1360 * batadv_bla_is_backbone_gw
1361 * @skb: the frame to be checked
1362 * @orig_node: the orig_node of the frame
1363 * @hdr_size: maximum length of the frame
1365 * bla_is_backbone_gw inspects the skb for the VLAN ID and returns 1
1366 * if the orig_node is also a gateway on the soft interface, otherwise it
1369 int batadv_bla_is_backbone_gw(struct sk_buff *skb,
1370 struct batadv_orig_node *orig_node, int hdr_size)
1372 struct ethhdr *ethhdr;
1373 struct vlan_ethhdr *vhdr;
1374 struct batadv_backbone_gw *backbone_gw;
1377 if (!atomic_read(&orig_node->bat_priv->bridge_loop_avoidance))
1380 /* first, find out the vid. */
1381 if (!pskb_may_pull(skb, hdr_size + ETH_HLEN))
1384 ethhdr = (struct ethhdr *)(((uint8_t *)skb->data) + hdr_size);
1386 if (ntohs(ethhdr->h_proto) == ETH_P_8021Q) {
1387 if (!pskb_may_pull(skb, hdr_size + sizeof(struct vlan_ethhdr)))
1390 vhdr = (struct vlan_ethhdr *)(skb->data + hdr_size);
1391 vid = ntohs(vhdr->h_vlan_TCI) & VLAN_VID_MASK;
1394 /* see if this originator is a backbone gw for this VLAN */
1395 backbone_gw = batadv_backbone_hash_find(orig_node->bat_priv,
1396 orig_node->orig, vid);
1400 batadv_backbone_gw_free_ref(backbone_gw);
1404 /* free all bla structures (for softinterface free or module unload) */
1405 void batadv_bla_free(struct batadv_priv *bat_priv)
1407 struct batadv_hard_iface *primary_if;
1409 cancel_delayed_work_sync(&bat_priv->bla.work);
1410 primary_if = batadv_primary_if_get_selected(bat_priv);
1412 if (bat_priv->bla.claim_hash) {
1413 batadv_bla_purge_claims(bat_priv, primary_if, 1);
1414 batadv_hash_destroy(bat_priv->bla.claim_hash);
1415 bat_priv->bla.claim_hash = NULL;
1417 if (bat_priv->bla.backbone_hash) {
1418 batadv_bla_purge_backbone_gw(bat_priv, 1);
1419 batadv_hash_destroy(bat_priv->bla.backbone_hash);
1420 bat_priv->bla.backbone_hash = NULL;
1423 batadv_hardif_free_ref(primary_if);
1428 * @bat_priv: the bat priv with all the soft interface information
1429 * @skb: the frame to be checked
1430 * @vid: the VLAN ID of the frame
1431 * @is_bcast: the packet came in a broadcast packet type.
1433 * bla_rx avoidance checks if:
1434 * * we have to race for a claim
1435 * * if the frame is allowed on the LAN
1437 * in these cases, the skb is further handled by this function and
1438 * returns 1, otherwise it returns 0 and the caller shall further
1441 int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, short vid,
1444 struct ethhdr *ethhdr;
1445 struct batadv_claim search_claim, *claim = NULL;
1446 struct batadv_hard_iface *primary_if;
1449 ethhdr = (struct ethhdr *)skb_mac_header(skb);
1451 primary_if = batadv_primary_if_get_selected(bat_priv);
1455 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1459 if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
1460 /* don't allow broadcasts while requests are in flight */
1461 if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast)
1464 memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN);
1465 search_claim.vid = vid;
1466 claim = batadv_claim_hash_find(bat_priv, &search_claim);
1469 /* possible optimization: race for a claim */
1470 /* No claim exists yet, claim it for us!
1472 batadv_handle_claim(bat_priv, primary_if,
1473 primary_if->net_dev->dev_addr,
1474 ethhdr->h_source, vid);
1478 /* if it is our own claim ... */
1479 if (batadv_compare_eth(claim->backbone_gw->orig,
1480 primary_if->net_dev->dev_addr)) {
1481 /* ... allow it in any case */
1482 claim->lasttime = jiffies;
1486 /* if it is a broadcast ... */
1487 if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) {
1488 /* ... drop it. the responsible gateway is in charge.
1490 * We need to check is_bcast because with the gateway
1491 * feature, broadcasts (like DHCP requests) may be sent
1492 * using a unicast packet type.
1496 /* seems the client considers us as its best gateway.
1497 * send a claim and update the claim table
1500 batadv_handle_claim(bat_priv, primary_if,
1501 primary_if->net_dev->dev_addr,
1502 ethhdr->h_source, vid);
1506 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
1516 batadv_hardif_free_ref(primary_if);
1518 batadv_claim_free_ref(claim);
1524 * @bat_priv: the bat priv with all the soft interface information
1525 * @skb: the frame to be checked
1526 * @vid: the VLAN ID of the frame
1529 * * a claim was received which has to be processed
1530 * * the frame is allowed on the mesh
1532 * in these cases, the skb is further handled by this function and
1533 * returns 1, otherwise it returns 0 and the caller shall further
1536 int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, short vid)
1538 struct ethhdr *ethhdr;
1539 struct batadv_claim search_claim, *claim = NULL;
1540 struct batadv_hard_iface *primary_if;
1543 primary_if = batadv_primary_if_get_selected(bat_priv);
1547 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1550 /* in VLAN case, the mac header might not be set. */
1551 skb_reset_mac_header(skb);
1553 if (batadv_bla_process_claim(bat_priv, primary_if, skb))
1556 ethhdr = (struct ethhdr *)skb_mac_header(skb);
1558 if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
1559 /* don't allow broadcasts while requests are in flight */
1560 if (is_multicast_ether_addr(ethhdr->h_dest))
1563 memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN);
1564 search_claim.vid = vid;
1566 claim = batadv_claim_hash_find(bat_priv, &search_claim);
1568 /* if no claim exists, allow it. */
1572 /* check if we are responsible. */
1573 if (batadv_compare_eth(claim->backbone_gw->orig,
1574 primary_if->net_dev->dev_addr)) {
1575 /* if yes, the client has roamed and we have
1578 batadv_handle_unclaim(bat_priv, primary_if,
1579 primary_if->net_dev->dev_addr,
1580 ethhdr->h_source, vid);
1584 /* check if it is a multicast/broadcast frame */
1585 if (is_multicast_ether_addr(ethhdr->h_dest)) {
1586 /* drop it. the responsible gateway has forwarded it into
1587 * the backbone network.
1591 /* we must allow it. at least if we are
1592 * responsible for the DESTINATION.
1597 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
1604 batadv_hardif_free_ref(primary_if);
1606 batadv_claim_free_ref(claim);
1610 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
1612 struct net_device *net_dev = (struct net_device *)seq->private;
1613 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1614 struct batadv_hashtable *hash = bat_priv->bla.claim_hash;
1615 struct batadv_claim *claim;
1616 struct batadv_hard_iface *primary_if;
1617 struct hlist_node *node;
1618 struct hlist_head *head;
1621 uint8_t *primary_addr;
1623 primary_if = batadv_seq_print_text_primary_if_get(seq);
1627 primary_addr = primary_if->net_dev->dev_addr;
1629 "Claims announced for the mesh %s (orig %pM, group id %04x)\n",
1630 net_dev->name, primary_addr,
1631 ntohs(bat_priv->bla.claim_dest.group));
1632 seq_printf(seq, " %-17s %-5s %-17s [o] (%-4s)\n",
1633 "Client", "VID", "Originator", "CRC");
1634 for (i = 0; i < hash->size; i++) {
1635 head = &hash->table[i];
1638 hlist_for_each_entry_rcu(claim, node, head, hash_entry) {
1639 is_own = batadv_compare_eth(claim->backbone_gw->orig,
1641 seq_printf(seq, " * %pM on % 5d by %pM [%c] (%04x)\n",
1642 claim->addr, claim->vid,
1643 claim->backbone_gw->orig,
1644 (is_own ? 'x' : ' '),
1645 claim->backbone_gw->crc);
1651 batadv_hardif_free_ref(primary_if);
1655 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
1657 struct net_device *net_dev = (struct net_device *)seq->private;
1658 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1659 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
1660 struct batadv_backbone_gw *backbone_gw;
1661 struct batadv_hard_iface *primary_if;
1662 struct hlist_node *node;
1663 struct hlist_head *head;
1667 uint8_t *primary_addr;
1669 primary_if = batadv_seq_print_text_primary_if_get(seq);
1673 primary_addr = primary_if->net_dev->dev_addr;
1675 "Backbones announced for the mesh %s (orig %pM, group id %04x)\n",
1676 net_dev->name, primary_addr,
1677 ntohs(bat_priv->bla.claim_dest.group));
1678 seq_printf(seq, " %-17s %-5s %-9s (%-4s)\n",
1679 "Originator", "VID", "last seen", "CRC");
1680 for (i = 0; i < hash->size; i++) {
1681 head = &hash->table[i];
1684 hlist_for_each_entry_rcu(backbone_gw, node, head, hash_entry) {
1685 msecs = jiffies_to_msecs(jiffies -
1686 backbone_gw->lasttime);
1687 secs = msecs / 1000;
1688 msecs = msecs % 1000;
1690 is_own = batadv_compare_eth(backbone_gw->orig,
1696 " * %pM on % 5d % 4i.%03is (%04x)\n",
1697 backbone_gw->orig, backbone_gw->vid,
1698 secs, msecs, backbone_gw->crc);
1704 batadv_hardif_free_ref(primary_if);