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 batadv_bla_claim *claim;
148 struct batadv_bla_claim *claim_tmp = NULL;
154 index = batadv_choose_claim(data, hash->size);
155 head = &hash->table[index];
158 hlist_for_each_entry_rcu(claim, head, hash_entry) {
159 if (!batadv_compare_claim(&claim->hash_entry, data))
162 if (!atomic_inc_not_zero(&claim->refcount))
174 * batadv_backbone_hash_find - looks for a claim in the hash
175 * @bat_priv: the bat priv with all the soft interface information
176 * @addr: the address of the originator
179 * Returns claim if found or NULL otherwise.
181 static struct batadv_bla_backbone_gw *
182 batadv_backbone_hash_find(struct batadv_priv *bat_priv,
183 uint8_t *addr, unsigned short vid)
185 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
186 struct hlist_head *head;
187 struct batadv_bla_backbone_gw search_entry, *backbone_gw;
188 struct batadv_bla_backbone_gw *backbone_gw_tmp = NULL;
194 memcpy(search_entry.orig, addr, ETH_ALEN);
195 search_entry.vid = vid;
197 index = batadv_choose_backbone_gw(&search_entry, hash->size);
198 head = &hash->table[index];
201 hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) {
202 if (!batadv_compare_backbone_gw(&backbone_gw->hash_entry,
206 if (!atomic_inc_not_zero(&backbone_gw->refcount))
209 backbone_gw_tmp = backbone_gw;
214 return backbone_gw_tmp;
217 /* delete all claims for a backbone */
219 batadv_bla_del_backbone_claims(struct batadv_bla_backbone_gw *backbone_gw)
221 struct batadv_hashtable *hash;
222 struct hlist_node *node_tmp;
223 struct hlist_head *head;
224 struct batadv_bla_claim *claim;
226 spinlock_t *list_lock; /* protects write access to the hash lists */
228 hash = backbone_gw->bat_priv->bla.claim_hash;
232 for (i = 0; i < hash->size; i++) {
233 head = &hash->table[i];
234 list_lock = &hash->list_locks[i];
236 spin_lock_bh(list_lock);
237 hlist_for_each_entry_safe(claim, node_tmp,
239 if (claim->backbone_gw != backbone_gw)
242 batadv_claim_free_ref(claim);
243 hlist_del_rcu(&claim->hash_entry);
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 unsigned 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,
311 BATADV_PRINT_VID(vid));
313 case BATADV_CLAIM_TYPE_UNCLAIM:
315 * set HW SRC to the clients mac
317 memcpy(hw_src, mac, ETH_ALEN);
318 batadv_dbg(BATADV_DBG_BLA, bat_priv,
319 "bla_send_claim(): UNCLAIM %pM on vid %d\n", mac,
320 BATADV_PRINT_VID(vid));
322 case BATADV_CLAIM_TYPE_ANNOUNCE:
323 /* announcement frame
324 * set HW SRC to the special mac containg the crc
326 memcpy(hw_src, mac, ETH_ALEN);
327 batadv_dbg(BATADV_DBG_BLA, bat_priv,
328 "bla_send_claim(): ANNOUNCE of %pM on vid %d\n",
329 ethhdr->h_source, BATADV_PRINT_VID(vid));
331 case BATADV_CLAIM_TYPE_REQUEST:
333 * set HW SRC and header destination to the receiving backbone
336 memcpy(hw_src, mac, ETH_ALEN);
337 memcpy(ethhdr->h_dest, mac, ETH_ALEN);
338 batadv_dbg(BATADV_DBG_BLA, bat_priv,
339 "bla_send_claim(): REQUEST of %pM to %pM on vid %d\n",
340 ethhdr->h_source, ethhdr->h_dest,
341 BATADV_PRINT_VID(vid));
345 if (vid & BATADV_VLAN_HAS_TAG)
346 skb = vlan_insert_tag(skb, htons(ETH_P_8021Q),
347 vid & VLAN_VID_MASK);
349 skb_reset_mac_header(skb);
350 skb->protocol = eth_type_trans(skb, soft_iface);
351 batadv_inc_counter(bat_priv, BATADV_CNT_RX);
352 batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
353 skb->len + ETH_HLEN);
354 soft_iface->last_rx = jiffies;
359 batadv_hardif_free_ref(primary_if);
363 * batadv_bla_get_backbone_gw
364 * @bat_priv: the bat priv with all the soft interface information
365 * @orig: the mac address of the originator
368 * searches for the backbone gw or creates a new one if it could not
371 static struct batadv_bla_backbone_gw *
372 batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, uint8_t *orig,
373 unsigned short vid, bool own_backbone)
375 struct batadv_bla_backbone_gw *entry;
376 struct batadv_orig_node *orig_node;
379 entry = batadv_backbone_hash_find(bat_priv, orig, vid);
384 batadv_dbg(BATADV_DBG_BLA, bat_priv,
385 "bla_get_backbone_gw(): not found (%pM, %d), creating new entry\n",
386 orig, BATADV_PRINT_VID(vid));
388 entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
393 entry->lasttime = jiffies;
394 entry->crc = BATADV_BLA_CRC_INIT;
395 entry->bat_priv = bat_priv;
396 atomic_set(&entry->request_sent, 0);
397 atomic_set(&entry->wait_periods, 0);
398 memcpy(entry->orig, orig, ETH_ALEN);
400 /* one for the hash, one for returning */
401 atomic_set(&entry->refcount, 2);
403 hash_added = batadv_hash_add(bat_priv->bla.backbone_hash,
404 batadv_compare_backbone_gw,
405 batadv_choose_backbone_gw, entry,
408 if (unlikely(hash_added != 0)) {
409 /* hash failed, free the structure */
414 /* this is a gateway now, remove any TT entry on this VLAN */
415 orig_node = batadv_orig_hash_find(bat_priv, orig);
417 batadv_tt_global_del_orig(bat_priv, orig_node, vid,
418 "became a backbone gateway");
419 batadv_orig_node_free_ref(orig_node);
423 batadv_bla_send_announce(bat_priv, entry);
425 /* this will be decreased in the worker thread */
426 atomic_inc(&entry->request_sent);
427 atomic_set(&entry->wait_periods, BATADV_BLA_WAIT_PERIODS);
428 atomic_inc(&bat_priv->bla.num_requests);
434 /* update or add the own backbone gw to make sure we announce
435 * where we receive other backbone gws
438 batadv_bla_update_own_backbone_gw(struct batadv_priv *bat_priv,
439 struct batadv_hard_iface *primary_if,
442 struct batadv_bla_backbone_gw *backbone_gw;
444 backbone_gw = batadv_bla_get_backbone_gw(bat_priv,
445 primary_if->net_dev->dev_addr,
447 if (unlikely(!backbone_gw))
450 backbone_gw->lasttime = jiffies;
451 batadv_backbone_gw_free_ref(backbone_gw);
454 /* @bat_priv: the bat priv with all the soft interface information
455 * @vid: the vid where the request came on
457 * Repeat all of our own claims, and finally send an ANNOUNCE frame
458 * to allow the requester another check if the CRC is correct now.
460 static void batadv_bla_answer_request(struct batadv_priv *bat_priv,
461 struct batadv_hard_iface *primary_if,
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, 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 unsigned 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",
578 mac, BATADV_PRINT_VID(vid));
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",
597 mac, BATADV_PRINT_VID(vid));
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 unsigned 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",
628 mac, BATADV_PRINT_VID(vid));
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 BATADV_PRINT_VID(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",
670 BATADV_PRINT_VID(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, unsigned 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 BATADV_PRINT_VID(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, unsigned short vid)
718 struct batadv_bla_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, BATADV_PRINT_VID(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_bla_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: %#.4x\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 batadv_bla_claim_dst *bla_dst;
862 uint8_t *hw_src, *hw_dst;
863 struct vlan_ethhdr *vhdr;
864 struct ethhdr *ethhdr;
865 struct arphdr *arphdr;
871 vid = batadv_get_vid(skb, 0);
872 ethhdr = eth_hdr(skb);
874 proto = ethhdr->h_proto;
876 if (vid & BATADV_VLAN_HAS_TAG) {
877 vhdr = (struct vlan_ethhdr *)ethhdr;
878 proto = vhdr->h_vlan_encapsulated_proto;
879 headlen += VLAN_HLEN;
882 if (proto != htons(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 = eth_hdr(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, BATADV_PRINT_VID(vid), hw_src,
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, BATADV_PRINT_VID(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_bla_backbone_gw *backbone_gw;
962 struct hlist_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_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);
996 hlist_del_rcu(&backbone_gw->hash_entry);
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_bla_claim *claim;
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, 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_head *head;
1066 struct batadv_hashtable *hash;
1070 /* reset bridge loop avoidance group id */
1071 group = htons(crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN));
1072 bat_priv->bla.claim_dest.group = group;
1074 /* purge everything when bridge loop avoidance is turned off */
1075 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1079 batadv_bla_purge_claims(bat_priv, NULL, 1);
1080 batadv_bla_purge_backbone_gw(bat_priv, 1);
1084 hash = bat_priv->bla.backbone_hash;
1088 for (i = 0; i < hash->size; i++) {
1089 head = &hash->table[i];
1092 hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) {
1093 /* own orig still holds the old value. */
1094 if (!batadv_compare_eth(backbone_gw->orig,
1095 oldif->net_dev->dev_addr))
1098 memcpy(backbone_gw->orig,
1099 primary_if->net_dev->dev_addr, ETH_ALEN);
1100 /* send an announce frame so others will ask for our
1101 * claims and update their tables.
1103 batadv_bla_send_announce(bat_priv, backbone_gw);
1109 /* periodic work to do:
1110 * * purge structures when they are too old
1111 * * send announcements
1113 static void batadv_bla_periodic_work(struct work_struct *work)
1115 struct delayed_work *delayed_work;
1116 struct batadv_priv *bat_priv;
1117 struct batadv_priv_bla *priv_bla;
1118 struct hlist_head *head;
1119 struct batadv_bla_backbone_gw *backbone_gw;
1120 struct batadv_hashtable *hash;
1121 struct batadv_hard_iface *primary_if;
1124 delayed_work = container_of(work, struct delayed_work, work);
1125 priv_bla = container_of(delayed_work, struct batadv_priv_bla, work);
1126 bat_priv = container_of(priv_bla, struct batadv_priv, bla);
1127 primary_if = batadv_primary_if_get_selected(bat_priv);
1131 batadv_bla_purge_claims(bat_priv, primary_if, 0);
1132 batadv_bla_purge_backbone_gw(bat_priv, 0);
1134 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1137 hash = bat_priv->bla.backbone_hash;
1141 for (i = 0; i < hash->size; i++) {
1142 head = &hash->table[i];
1145 hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) {
1146 if (!batadv_compare_eth(backbone_gw->orig,
1147 primary_if->net_dev->dev_addr))
1150 backbone_gw->lasttime = jiffies;
1152 batadv_bla_send_announce(bat_priv, backbone_gw);
1154 /* request_sent is only set after creation to avoid
1155 * problems when we are not yet known as backbone gw
1158 * We can reset this now after we waited some periods
1159 * to give bridge forward delays and bla group forming
1163 if (atomic_read(&backbone_gw->request_sent) == 0)
1166 if (!atomic_dec_and_test(&backbone_gw->wait_periods))
1169 atomic_dec(&backbone_gw->bat_priv->bla.num_requests);
1170 atomic_set(&backbone_gw->request_sent, 0);
1176 batadv_hardif_free_ref(primary_if);
1178 queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work,
1179 msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH));
1182 /* The hash for claim and backbone hash receive the same key because they
1183 * are getting initialized by hash_new with the same key. Reinitializing
1184 * them with to different keys to allow nested locking without generating
1187 static struct lock_class_key batadv_claim_hash_lock_class_key;
1188 static struct lock_class_key batadv_backbone_hash_lock_class_key;
1190 /* initialize all bla structures */
1191 int batadv_bla_init(struct batadv_priv *bat_priv)
1194 uint8_t claim_dest[ETH_ALEN] = {0xff, 0x43, 0x05, 0x00, 0x00, 0x00};
1195 struct batadv_hard_iface *primary_if;
1197 unsigned long entrytime;
1199 spin_lock_init(&bat_priv->bla.bcast_duplist_lock);
1201 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hash registering\n");
1203 /* setting claim destination address */
1204 memcpy(&bat_priv->bla.claim_dest.magic, claim_dest, 3);
1205 bat_priv->bla.claim_dest.type = 0;
1206 primary_if = batadv_primary_if_get_selected(bat_priv);
1208 crc = crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN);
1209 bat_priv->bla.claim_dest.group = htons(crc);
1210 batadv_hardif_free_ref(primary_if);
1212 bat_priv->bla.claim_dest.group = 0; /* will be set later */
1215 /* initialize the duplicate list */
1216 entrytime = jiffies - msecs_to_jiffies(BATADV_DUPLIST_TIMEOUT);
1217 for (i = 0; i < BATADV_DUPLIST_SIZE; i++)
1218 bat_priv->bla.bcast_duplist[i].entrytime = entrytime;
1219 bat_priv->bla.bcast_duplist_curr = 0;
1221 if (bat_priv->bla.claim_hash)
1224 bat_priv->bla.claim_hash = batadv_hash_new(128);
1225 bat_priv->bla.backbone_hash = batadv_hash_new(32);
1227 if (!bat_priv->bla.claim_hash || !bat_priv->bla.backbone_hash)
1230 batadv_hash_set_lock_class(bat_priv->bla.claim_hash,
1231 &batadv_claim_hash_lock_class_key);
1232 batadv_hash_set_lock_class(bat_priv->bla.backbone_hash,
1233 &batadv_backbone_hash_lock_class_key);
1235 batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hashes initialized\n");
1237 INIT_DELAYED_WORK(&bat_priv->bla.work, batadv_bla_periodic_work);
1239 queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work,
1240 msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH));
1245 * batadv_bla_check_bcast_duplist
1246 * @bat_priv: the bat priv with all the soft interface information
1247 * @skb: contains the bcast_packet to be checked
1249 * check if it is on our broadcast list. Another gateway might
1250 * have sent the same packet because it is connected to the same backbone,
1251 * so we have to remove this duplicate.
1253 * This is performed by checking the CRC, which will tell us
1254 * with a good chance that it is the same packet. If it is furthermore
1255 * sent by another host, drop it. We allow equal packets from
1256 * the same host however as this might be intended.
1258 int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv,
1259 struct sk_buff *skb)
1261 int i, curr, ret = 0;
1263 struct batadv_bcast_packet *bcast_packet;
1264 struct batadv_bcast_duplist_entry *entry;
1266 bcast_packet = (struct batadv_bcast_packet *)skb->data;
1268 /* calculate the crc ... */
1269 crc = batadv_skb_crc32(skb, (u8 *)(bcast_packet + 1));
1271 spin_lock_bh(&bat_priv->bla.bcast_duplist_lock);
1273 for (i = 0; i < BATADV_DUPLIST_SIZE; i++) {
1274 curr = (bat_priv->bla.bcast_duplist_curr + i);
1275 curr %= BATADV_DUPLIST_SIZE;
1276 entry = &bat_priv->bla.bcast_duplist[curr];
1278 /* we can stop searching if the entry is too old ;
1279 * later entries will be even older
1281 if (batadv_has_timed_out(entry->entrytime,
1282 BATADV_DUPLIST_TIMEOUT))
1285 if (entry->crc != crc)
1288 if (batadv_compare_eth(entry->orig, bcast_packet->orig))
1291 /* this entry seems to match: same crc, not too old,
1292 * and from another gw. therefore return 1 to forbid it.
1297 /* not found, add a new entry (overwrite the oldest entry)
1298 * and allow it, its the first occurence.
1300 curr = (bat_priv->bla.bcast_duplist_curr + BATADV_DUPLIST_SIZE - 1);
1301 curr %= BATADV_DUPLIST_SIZE;
1302 entry = &bat_priv->bla.bcast_duplist[curr];
1304 entry->entrytime = jiffies;
1305 memcpy(entry->orig, bcast_packet->orig, ETH_ALEN);
1306 bat_priv->bla.bcast_duplist_curr = curr;
1309 spin_unlock_bh(&bat_priv->bla.bcast_duplist_lock);
1316 /* @bat_priv: the bat priv with all the soft interface information
1317 * @orig: originator mac address
1318 * @vid: VLAN identifier
1320 * Check if the originator is a gateway for the VLAN identified by vid.
1322 * Returns true if orig is a backbone for this vid, false otherwise.
1324 bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, uint8_t *orig,
1327 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
1328 struct hlist_head *head;
1329 struct batadv_bla_backbone_gw *backbone_gw;
1332 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1338 for (i = 0; i < hash->size; i++) {
1339 head = &hash->table[i];
1342 hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) {
1343 if (batadv_compare_eth(backbone_gw->orig, orig) &&
1344 backbone_gw->vid == vid) {
1357 * batadv_bla_is_backbone_gw
1358 * @skb: the frame to be checked
1359 * @orig_node: the orig_node of the frame
1360 * @hdr_size: maximum length of the frame
1362 * bla_is_backbone_gw inspects the skb for the VLAN ID and returns 1
1363 * if the orig_node is also a gateway on the soft interface, otherwise it
1366 int batadv_bla_is_backbone_gw(struct sk_buff *skb,
1367 struct batadv_orig_node *orig_node, int hdr_size)
1369 struct batadv_bla_backbone_gw *backbone_gw;
1372 if (!atomic_read(&orig_node->bat_priv->bridge_loop_avoidance))
1375 /* first, find out the vid. */
1376 if (!pskb_may_pull(skb, hdr_size + ETH_HLEN))
1379 vid = batadv_get_vid(skb, hdr_size);
1381 /* see if this originator is a backbone gw for this VLAN */
1382 backbone_gw = batadv_backbone_hash_find(orig_node->bat_priv,
1383 orig_node->orig, vid);
1387 batadv_backbone_gw_free_ref(backbone_gw);
1391 /* free all bla structures (for softinterface free or module unload) */
1392 void batadv_bla_free(struct batadv_priv *bat_priv)
1394 struct batadv_hard_iface *primary_if;
1396 cancel_delayed_work_sync(&bat_priv->bla.work);
1397 primary_if = batadv_primary_if_get_selected(bat_priv);
1399 if (bat_priv->bla.claim_hash) {
1400 batadv_bla_purge_claims(bat_priv, primary_if, 1);
1401 batadv_hash_destroy(bat_priv->bla.claim_hash);
1402 bat_priv->bla.claim_hash = NULL;
1404 if (bat_priv->bla.backbone_hash) {
1405 batadv_bla_purge_backbone_gw(bat_priv, 1);
1406 batadv_hash_destroy(bat_priv->bla.backbone_hash);
1407 bat_priv->bla.backbone_hash = NULL;
1410 batadv_hardif_free_ref(primary_if);
1415 * @bat_priv: the bat priv with all the soft interface information
1416 * @skb: the frame to be checked
1417 * @vid: the VLAN ID of the frame
1418 * @is_bcast: the packet came in a broadcast packet type.
1420 * bla_rx avoidance checks if:
1421 * * we have to race for a claim
1422 * * if the frame is allowed on the LAN
1424 * in these cases, the skb is further handled by this function and
1425 * returns 1, otherwise it returns 0 and the caller shall further
1428 int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb,
1429 unsigned short vid, bool is_bcast)
1431 struct ethhdr *ethhdr;
1432 struct batadv_bla_claim search_claim, *claim = NULL;
1433 struct batadv_hard_iface *primary_if;
1436 ethhdr = eth_hdr(skb);
1438 primary_if = batadv_primary_if_get_selected(bat_priv);
1442 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1446 if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
1447 /* don't allow broadcasts while requests are in flight */
1448 if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast)
1451 memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN);
1452 search_claim.vid = vid;
1453 claim = batadv_claim_hash_find(bat_priv, &search_claim);
1456 /* possible optimization: race for a claim */
1457 /* No claim exists yet, claim it for us!
1459 batadv_handle_claim(bat_priv, primary_if,
1460 primary_if->net_dev->dev_addr,
1461 ethhdr->h_source, vid);
1465 /* if it is our own claim ... */
1466 if (batadv_compare_eth(claim->backbone_gw->orig,
1467 primary_if->net_dev->dev_addr)) {
1468 /* ... allow it in any case */
1469 claim->lasttime = jiffies;
1473 /* if it is a broadcast ... */
1474 if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) {
1475 /* ... drop it. the responsible gateway is in charge.
1477 * We need to check is_bcast because with the gateway
1478 * feature, broadcasts (like DHCP requests) may be sent
1479 * using a unicast packet type.
1483 /* seems the client considers us as its best gateway.
1484 * send a claim and update the claim table
1487 batadv_handle_claim(bat_priv, primary_if,
1488 primary_if->net_dev->dev_addr,
1489 ethhdr->h_source, vid);
1493 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
1503 batadv_hardif_free_ref(primary_if);
1505 batadv_claim_free_ref(claim);
1511 * @bat_priv: the bat priv with all the soft interface information
1512 * @skb: the frame to be checked
1513 * @vid: the VLAN ID of the frame
1516 * * a claim was received which has to be processed
1517 * * the frame is allowed on the mesh
1519 * in these cases, the skb is further handled by this function and
1520 * returns 1, otherwise it returns 0 and the caller shall further
1523 * This call might reallocate skb data.
1525 int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb,
1528 struct ethhdr *ethhdr;
1529 struct batadv_bla_claim search_claim, *claim = NULL;
1530 struct batadv_hard_iface *primary_if;
1533 primary_if = batadv_primary_if_get_selected(bat_priv);
1537 if (!atomic_read(&bat_priv->bridge_loop_avoidance))
1540 /* in VLAN case, the mac header might not be set. */
1541 skb_reset_mac_header(skb);
1543 if (batadv_bla_process_claim(bat_priv, primary_if, skb))
1546 ethhdr = eth_hdr(skb);
1548 if (unlikely(atomic_read(&bat_priv->bla.num_requests)))
1549 /* don't allow broadcasts while requests are in flight */
1550 if (is_multicast_ether_addr(ethhdr->h_dest))
1553 memcpy(search_claim.addr, ethhdr->h_source, ETH_ALEN);
1554 search_claim.vid = vid;
1556 claim = batadv_claim_hash_find(bat_priv, &search_claim);
1558 /* if no claim exists, allow it. */
1562 /* check if we are responsible. */
1563 if (batadv_compare_eth(claim->backbone_gw->orig,
1564 primary_if->net_dev->dev_addr)) {
1565 /* if yes, the client has roamed and we have
1568 batadv_handle_unclaim(bat_priv, primary_if,
1569 primary_if->net_dev->dev_addr,
1570 ethhdr->h_source, vid);
1574 /* check if it is a multicast/broadcast frame */
1575 if (is_multicast_ether_addr(ethhdr->h_dest)) {
1576 /* drop it. the responsible gateway has forwarded it into
1577 * the backbone network.
1581 /* we must allow it. at least if we are
1582 * responsible for the DESTINATION.
1587 batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid);
1594 batadv_hardif_free_ref(primary_if);
1596 batadv_claim_free_ref(claim);
1600 int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset)
1602 struct net_device *net_dev = (struct net_device *)seq->private;
1603 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1604 struct batadv_hashtable *hash = bat_priv->bla.claim_hash;
1605 struct batadv_bla_claim *claim;
1606 struct batadv_hard_iface *primary_if;
1607 struct hlist_head *head;
1610 uint8_t *primary_addr;
1612 primary_if = batadv_seq_print_text_primary_if_get(seq);
1616 primary_addr = primary_if->net_dev->dev_addr;
1618 "Claims announced for the mesh %s (orig %pM, group id %#.4x)\n",
1619 net_dev->name, primary_addr,
1620 ntohs(bat_priv->bla.claim_dest.group));
1621 seq_printf(seq, " %-17s %-5s %-17s [o] (%-6s)\n",
1622 "Client", "VID", "Originator", "CRC");
1623 for (i = 0; i < hash->size; i++) {
1624 head = &hash->table[i];
1627 hlist_for_each_entry_rcu(claim, head, hash_entry) {
1628 is_own = batadv_compare_eth(claim->backbone_gw->orig,
1630 seq_printf(seq, " * %pM on %5d by %pM [%c] (%#.4x)\n",
1631 claim->addr, BATADV_PRINT_VID(claim->vid),
1632 claim->backbone_gw->orig,
1633 (is_own ? 'x' : ' '),
1634 claim->backbone_gw->crc);
1640 batadv_hardif_free_ref(primary_if);
1644 int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset)
1646 struct net_device *net_dev = (struct net_device *)seq->private;
1647 struct batadv_priv *bat_priv = netdev_priv(net_dev);
1648 struct batadv_hashtable *hash = bat_priv->bla.backbone_hash;
1649 struct batadv_bla_backbone_gw *backbone_gw;
1650 struct batadv_hard_iface *primary_if;
1651 struct hlist_head *head;
1655 uint8_t *primary_addr;
1657 primary_if = batadv_seq_print_text_primary_if_get(seq);
1661 primary_addr = primary_if->net_dev->dev_addr;
1663 "Backbones announced for the mesh %s (orig %pM, group id %#.4x)\n",
1664 net_dev->name, primary_addr,
1665 ntohs(bat_priv->bla.claim_dest.group));
1666 seq_printf(seq, " %-17s %-5s %-9s (%-6s)\n",
1667 "Originator", "VID", "last seen", "CRC");
1668 for (i = 0; i < hash->size; i++) {
1669 head = &hash->table[i];
1672 hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) {
1673 msecs = jiffies_to_msecs(jiffies -
1674 backbone_gw->lasttime);
1675 secs = msecs / 1000;
1676 msecs = msecs % 1000;
1678 is_own = batadv_compare_eth(backbone_gw->orig,
1683 seq_printf(seq, " * %pM on %5d %4i.%03is (%#.4x)\n",
1685 BATADV_PRINT_VID(backbone_gw->vid), secs,
1686 msecs, backbone_gw->crc);
1692 batadv_hardif_free_ref(primary_if);