Commit | Line | Data |
---|---|---|
0046b040 | 1 | /* Copyright (C) 2011-2016 B.A.T.M.A.N. contributors: |
23721387 SW |
2 | * |
3 | * Simon Wunderlich | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
ebf38fb7 | 15 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
23721387 SW |
16 | */ |
17 | ||
23721387 | 18 | #include "bridge_loop_avoidance.h" |
1e2c2a4f | 19 | #include "main.h" |
23721387 | 20 | |
1e2c2a4f SE |
21 | #include <linux/atomic.h> |
22 | #include <linux/byteorder/generic.h> | |
23 | #include <linux/compiler.h> | |
23721387 | 24 | #include <linux/crc16.h> |
1e2c2a4f SE |
25 | #include <linux/errno.h> |
26 | #include <linux/etherdevice.h> | |
27 | #include <linux/fs.h> | |
23721387 | 28 | #include <linux/if_arp.h> |
1e2c2a4f | 29 | #include <linux/if_ether.h> |
23721387 | 30 | #include <linux/if_vlan.h> |
1e2c2a4f SE |
31 | #include <linux/jhash.h> |
32 | #include <linux/jiffies.h> | |
33 | #include <linux/kernel.h> | |
06e56ded | 34 | #include <linux/kref.h> |
1e2c2a4f SE |
35 | #include <linux/list.h> |
36 | #include <linux/lockdep.h> | |
37 | #include <linux/netdevice.h> | |
38 | #include <linux/rculist.h> | |
39 | #include <linux/rcupdate.h> | |
40 | #include <linux/seq_file.h> | |
41 | #include <linux/skbuff.h> | |
42 | #include <linux/slab.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/stddef.h> | |
45 | #include <linux/string.h> | |
46 | #include <linux/workqueue.h> | |
47 | #include <net/arp.h> | |
48 | ||
49 | #include "hard-interface.h" | |
50 | #include "hash.h" | |
51 | #include "originator.h" | |
52 | #include "packet.h" | |
53 | #include "translation-table.h" | |
23721387 | 54 | |
6b5e971a | 55 | static const u8 batadv_announce_mac[4] = {0x43, 0x05, 0x43, 0x05}; |
23721387 | 56 | |
3b300de3 | 57 | static void batadv_bla_periodic_work(struct work_struct *work); |
bae98774 ML |
58 | static void |
59 | batadv_bla_send_announce(struct batadv_priv *bat_priv, | |
60 | struct batadv_bla_backbone_gw *backbone_gw); | |
23721387 | 61 | |
62fe710f | 62 | /** |
04e14be6 SW |
63 | * batadv_choose_claim - choose the right bucket for a claim. |
64 | * @data: data to hash | |
65 | * @size: size of the hash table | |
62fe710f | 66 | * |
04e14be6 | 67 | * Return: the hash index of the claim |
62fe710f | 68 | */ |
6b5e971a | 69 | static inline u32 batadv_choose_claim(const void *data, u32 size) |
23721387 | 70 | { |
712bbfe4 | 71 | struct batadv_bla_claim *claim = (struct batadv_bla_claim *)data; |
6b5e971a | 72 | u32 hash = 0; |
23721387 | 73 | |
36fd61cb SE |
74 | hash = jhash(&claim->addr, sizeof(claim->addr), hash); |
75 | hash = jhash(&claim->vid, sizeof(claim->vid), hash); | |
23721387 SW |
76 | |
77 | return hash % size; | |
78 | } | |
79 | ||
62fe710f | 80 | /** |
04e14be6 SW |
81 | * batadv_choose_backbone_gw - choose the right bucket for a backbone gateway. |
82 | * @data: data to hash | |
83 | * @size: size of the hash table | |
62fe710f | 84 | * |
04e14be6 | 85 | * Return: the hash index of the backbone gateway |
62fe710f | 86 | */ |
6b5e971a | 87 | static inline u32 batadv_choose_backbone_gw(const void *data, u32 size) |
23721387 | 88 | { |
712bbfe4 | 89 | const struct batadv_bla_claim *claim = (struct batadv_bla_claim *)data; |
6b5e971a | 90 | u32 hash = 0; |
23721387 | 91 | |
36fd61cb SE |
92 | hash = jhash(&claim->addr, sizeof(claim->addr), hash); |
93 | hash = jhash(&claim->vid, sizeof(claim->vid), hash); | |
23721387 SW |
94 | |
95 | return hash % size; | |
96 | } | |
97 | ||
04e14be6 SW |
98 | /** |
99 | * batadv_compare_backbone_gw - compare address and vid of two backbone gws | |
100 | * @node: list node of the first entry to compare | |
101 | * @data2: pointer to the second backbone gateway | |
102 | * | |
103 | * Return: 1 if the backbones have the same data, 0 otherwise | |
104 | */ | |
3b300de3 SE |
105 | static int batadv_compare_backbone_gw(const struct hlist_node *node, |
106 | const void *data2) | |
23721387 | 107 | { |
bae98774 | 108 | const void *data1 = container_of(node, struct batadv_bla_backbone_gw, |
23721387 | 109 | hash_entry); |
4f248cff SE |
110 | const struct batadv_bla_backbone_gw *gw1 = data1; |
111 | const struct batadv_bla_backbone_gw *gw2 = data2; | |
23721387 | 112 | |
c76d1525 SW |
113 | if (!batadv_compare_eth(gw1->orig, gw2->orig)) |
114 | return 0; | |
115 | ||
116 | if (gw1->vid != gw2->vid) | |
117 | return 0; | |
118 | ||
119 | return 1; | |
23721387 SW |
120 | } |
121 | ||
04e14be6 | 122 | /** |
98a5b1d8 | 123 | * batadv_compare_claim - compare address and vid of two claims |
04e14be6 SW |
124 | * @node: list node of the first entry to compare |
125 | * @data2: pointer to the second claims | |
126 | * | |
127 | * Return: 1 if the claim have the same data, 0 otherwise | |
128 | */ | |
3b300de3 SE |
129 | static int batadv_compare_claim(const struct hlist_node *node, |
130 | const void *data2) | |
23721387 | 131 | { |
712bbfe4 | 132 | const void *data1 = container_of(node, struct batadv_bla_claim, |
23721387 | 133 | hash_entry); |
4f248cff SE |
134 | const struct batadv_bla_claim *cl1 = data1; |
135 | const struct batadv_bla_claim *cl2 = data2; | |
c76d1525 SW |
136 | |
137 | if (!batadv_compare_eth(cl1->addr, cl2->addr)) | |
138 | return 0; | |
139 | ||
140 | if (cl1->vid != cl2->vid) | |
141 | return 0; | |
23721387 | 142 | |
c76d1525 | 143 | return 1; |
23721387 SW |
144 | } |
145 | ||
04e14be6 | 146 | /** |
06e56ded SE |
147 | * batadv_backbone_gw_release - release backbone gw from lists and queue for |
148 | * free after rcu grace period | |
149 | * @ref: kref pointer of the backbone gw | |
150 | */ | |
151 | static void batadv_backbone_gw_release(struct kref *ref) | |
152 | { | |
153 | struct batadv_bla_backbone_gw *backbone_gw; | |
154 | ||
155 | backbone_gw = container_of(ref, struct batadv_bla_backbone_gw, | |
156 | refcount); | |
157 | ||
158 | kfree_rcu(backbone_gw, rcu); | |
159 | } | |
160 | ||
161 | /** | |
c8b86c12 SE |
162 | * batadv_backbone_gw_put - decrement the backbone gw refcounter and possibly |
163 | * release it | |
04e14be6 SW |
164 | * @backbone_gw: backbone gateway to be free'd |
165 | */ | |
c8b86c12 | 166 | static void batadv_backbone_gw_put(struct batadv_bla_backbone_gw *backbone_gw) |
23721387 | 167 | { |
06e56ded | 168 | kref_put(&backbone_gw->refcount, batadv_backbone_gw_release); |
23721387 SW |
169 | } |
170 | ||
04e14be6 SW |
171 | /** |
172 | * batadv_claim_release - release claim from lists and queue for free after rcu | |
173 | * grace period | |
174 | * @ref: kref pointer of the claim | |
175 | */ | |
71b7e3d3 | 176 | static void batadv_claim_release(struct kref *ref) |
23721387 | 177 | { |
71b7e3d3 SE |
178 | struct batadv_bla_claim *claim; |
179 | ||
180 | claim = container_of(ref, struct batadv_bla_claim, refcount); | |
181 | ||
c8b86c12 | 182 | batadv_backbone_gw_put(claim->backbone_gw); |
63b39927 | 183 | kfree_rcu(claim, rcu); |
23721387 SW |
184 | } |
185 | ||
04e14be6 | 186 | /** |
321e3e08 | 187 | * batadv_claim_put - decrement the claim refcounter and possibly |
ec9b83ca | 188 | * release it |
04e14be6 SW |
189 | * @claim: claim to be free'd |
190 | */ | |
321e3e08 | 191 | static void batadv_claim_put(struct batadv_bla_claim *claim) |
23721387 | 192 | { |
71b7e3d3 | 193 | kref_put(&claim->refcount, batadv_claim_release); |
23721387 SW |
194 | } |
195 | ||
1b371d13 | 196 | /** |
04e14be6 | 197 | * batadv_claim_hash_find - looks for a claim in the claim hash |
1b371d13 | 198 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
199 | * @data: search data (may be local/static data) |
200 | * | |
62fe710f | 201 | * Return: claim if found or NULL otherwise. |
23721387 | 202 | */ |
6fc77a54 SE |
203 | static struct batadv_bla_claim * |
204 | batadv_claim_hash_find(struct batadv_priv *bat_priv, | |
205 | struct batadv_bla_claim *data) | |
23721387 | 206 | { |
807736f6 | 207 | struct batadv_hashtable *hash = bat_priv->bla.claim_hash; |
23721387 | 208 | struct hlist_head *head; |
712bbfe4 ML |
209 | struct batadv_bla_claim *claim; |
210 | struct batadv_bla_claim *claim_tmp = NULL; | |
23721387 SW |
211 | int index; |
212 | ||
213 | if (!hash) | |
214 | return NULL; | |
215 | ||
3b300de3 | 216 | index = batadv_choose_claim(data, hash->size); |
23721387 SW |
217 | head = &hash->table[index]; |
218 | ||
219 | rcu_read_lock(); | |
b67bfe0d | 220 | hlist_for_each_entry_rcu(claim, head, hash_entry) { |
3b300de3 | 221 | if (!batadv_compare_claim(&claim->hash_entry, data)) |
23721387 SW |
222 | continue; |
223 | ||
71b7e3d3 | 224 | if (!kref_get_unless_zero(&claim->refcount)) |
23721387 SW |
225 | continue; |
226 | ||
227 | claim_tmp = claim; | |
228 | break; | |
229 | } | |
230 | rcu_read_unlock(); | |
231 | ||
232 | return claim_tmp; | |
233 | } | |
234 | ||
2c53040f | 235 | /** |
04e14be6 | 236 | * batadv_backbone_hash_find - looks for a backbone gateway in the hash |
2c53040f | 237 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
238 | * @addr: the address of the originator |
239 | * @vid: the VLAN ID | |
240 | * | |
04e14be6 | 241 | * Return: backbone gateway if found or NULL otherwise |
23721387 | 242 | */ |
bae98774 | 243 | static struct batadv_bla_backbone_gw * |
6b5e971a SE |
244 | batadv_backbone_hash_find(struct batadv_priv *bat_priv, u8 *addr, |
245 | unsigned short vid) | |
23721387 | 246 | { |
807736f6 | 247 | struct batadv_hashtable *hash = bat_priv->bla.backbone_hash; |
23721387 | 248 | struct hlist_head *head; |
bae98774 ML |
249 | struct batadv_bla_backbone_gw search_entry, *backbone_gw; |
250 | struct batadv_bla_backbone_gw *backbone_gw_tmp = NULL; | |
23721387 SW |
251 | int index; |
252 | ||
253 | if (!hash) | |
254 | return NULL; | |
255 | ||
8fdd0153 | 256 | ether_addr_copy(search_entry.orig, addr); |
23721387 SW |
257 | search_entry.vid = vid; |
258 | ||
3b300de3 | 259 | index = batadv_choose_backbone_gw(&search_entry, hash->size); |
23721387 SW |
260 | head = &hash->table[index]; |
261 | ||
262 | rcu_read_lock(); | |
b67bfe0d | 263 | hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) { |
3b300de3 SE |
264 | if (!batadv_compare_backbone_gw(&backbone_gw->hash_entry, |
265 | &search_entry)) | |
23721387 SW |
266 | continue; |
267 | ||
06e56ded | 268 | if (!kref_get_unless_zero(&backbone_gw->refcount)) |
23721387 SW |
269 | continue; |
270 | ||
271 | backbone_gw_tmp = backbone_gw; | |
272 | break; | |
273 | } | |
274 | rcu_read_unlock(); | |
275 | ||
276 | return backbone_gw_tmp; | |
277 | } | |
278 | ||
04e14be6 SW |
279 | /** |
280 | * batadv_bla_del_backbone_claims - delete all claims for a backbone | |
281 | * @backbone_gw: backbone gateway where the claims should be removed | |
282 | */ | |
56303d34 | 283 | static void |
bae98774 | 284 | batadv_bla_del_backbone_claims(struct batadv_bla_backbone_gw *backbone_gw) |
23721387 | 285 | { |
5bf74e9c | 286 | struct batadv_hashtable *hash; |
b67bfe0d | 287 | struct hlist_node *node_tmp; |
23721387 | 288 | struct hlist_head *head; |
712bbfe4 | 289 | struct batadv_bla_claim *claim; |
23721387 SW |
290 | int i; |
291 | spinlock_t *list_lock; /* protects write access to the hash lists */ | |
292 | ||
807736f6 | 293 | hash = backbone_gw->bat_priv->bla.claim_hash; |
23721387 SW |
294 | if (!hash) |
295 | return; | |
296 | ||
297 | for (i = 0; i < hash->size; i++) { | |
298 | head = &hash->table[i]; | |
299 | list_lock = &hash->list_locks[i]; | |
300 | ||
301 | spin_lock_bh(list_lock); | |
b67bfe0d | 302 | hlist_for_each_entry_safe(claim, node_tmp, |
23721387 | 303 | head, hash_entry) { |
23721387 SW |
304 | if (claim->backbone_gw != backbone_gw) |
305 | continue; | |
306 | ||
321e3e08 | 307 | batadv_claim_put(claim); |
b67bfe0d | 308 | hlist_del_rcu(&claim->hash_entry); |
23721387 SW |
309 | } |
310 | spin_unlock_bh(list_lock); | |
311 | } | |
312 | ||
3f68785e | 313 | /* all claims gone, initialize CRC */ |
5a1dd8a4 | 314 | spin_lock_bh(&backbone_gw->crc_lock); |
3964f728 | 315 | backbone_gw->crc = BATADV_BLA_CRC_INIT; |
5a1dd8a4 | 316 | spin_unlock_bh(&backbone_gw->crc_lock); |
23721387 SW |
317 | } |
318 | ||
2c53040f BH |
319 | /** |
320 | * batadv_bla_send_claim - sends a claim frame according to the provided info | |
321 | * @bat_priv: the bat priv with all the soft interface information | |
e3357189 | 322 | * @mac: the mac address to be announced within the claim |
23721387 SW |
323 | * @vid: the VLAN ID |
324 | * @claimtype: the type of the claim (CLAIM, UNCLAIM, ANNOUNCE, ...) | |
23721387 | 325 | */ |
6b5e971a | 326 | static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac, |
eb2deb6b | 327 | unsigned short vid, int claimtype) |
23721387 SW |
328 | { |
329 | struct sk_buff *skb; | |
330 | struct ethhdr *ethhdr; | |
56303d34 | 331 | struct batadv_hard_iface *primary_if; |
23721387 | 332 | struct net_device *soft_iface; |
6b5e971a | 333 | u8 *hw_src; |
96412690 | 334 | struct batadv_bla_claim_dst local_claim_dest; |
3e2f1a1b | 335 | __be32 zeroip = 0; |
23721387 | 336 | |
e5d89254 | 337 | primary_if = batadv_primary_if_get_selected(bat_priv); |
23721387 SW |
338 | if (!primary_if) |
339 | return; | |
340 | ||
807736f6 | 341 | memcpy(&local_claim_dest, &bat_priv->bla.claim_dest, |
38ef3d1d | 342 | sizeof(local_claim_dest)); |
23721387 SW |
343 | local_claim_dest.type = claimtype; |
344 | ||
345 | soft_iface = primary_if->soft_iface; | |
346 | ||
347 | skb = arp_create(ARPOP_REPLY, ETH_P_ARP, | |
348 | /* IP DST: 0.0.0.0 */ | |
349 | zeroip, | |
350 | primary_if->soft_iface, | |
351 | /* IP SRC: 0.0.0.0 */ | |
352 | zeroip, | |
353 | /* Ethernet DST: Broadcast */ | |
354 | NULL, | |
355 | /* Ethernet SRC/HW SRC: originator mac */ | |
356 | primary_if->net_dev->dev_addr, | |
99e966fc | 357 | /* HW DST: FF:43:05:XX:YY:YY |
23721387 | 358 | * with XX = claim type |
38ef3d1d | 359 | * and YY:YY = group id |
23721387 | 360 | */ |
6b5e971a | 361 | (u8 *)&local_claim_dest); |
23721387 SW |
362 | |
363 | if (!skb) | |
364 | goto out; | |
365 | ||
366 | ethhdr = (struct ethhdr *)skb->data; | |
6b5e971a | 367 | hw_src = (u8 *)ethhdr + ETH_HLEN + sizeof(struct arphdr); |
23721387 SW |
368 | |
369 | /* now we pretend that the client would have sent this ... */ | |
370 | switch (claimtype) { | |
3eb8773e | 371 | case BATADV_CLAIM_TYPE_CLAIM: |
23721387 SW |
372 | /* normal claim frame |
373 | * set Ethernet SRC to the clients mac | |
374 | */ | |
8fdd0153 | 375 | ether_addr_copy(ethhdr->h_source, mac); |
39c75a51 | 376 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
5f80df67 AQ |
377 | "bla_send_claim(): CLAIM %pM on vid %d\n", mac, |
378 | BATADV_PRINT_VID(vid)); | |
23721387 | 379 | break; |
3eb8773e | 380 | case BATADV_CLAIM_TYPE_UNCLAIM: |
23721387 SW |
381 | /* unclaim frame |
382 | * set HW SRC to the clients mac | |
383 | */ | |
8fdd0153 | 384 | ether_addr_copy(hw_src, mac); |
39c75a51 | 385 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 386 | "bla_send_claim(): UNCLAIM %pM on vid %d\n", mac, |
5f80df67 | 387 | BATADV_PRINT_VID(vid)); |
23721387 | 388 | break; |
acd34afa | 389 | case BATADV_CLAIM_TYPE_ANNOUNCE: |
23721387 SW |
390 | /* announcement frame |
391 | * set HW SRC to the special mac containg the crc | |
392 | */ | |
8fdd0153 | 393 | ether_addr_copy(hw_src, mac); |
39c75a51 | 394 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 395 | "bla_send_claim(): ANNOUNCE of %pM on vid %d\n", |
5f80df67 | 396 | ethhdr->h_source, BATADV_PRINT_VID(vid)); |
23721387 | 397 | break; |
acd34afa | 398 | case BATADV_CLAIM_TYPE_REQUEST: |
23721387 | 399 | /* request frame |
99e966fc SW |
400 | * set HW SRC and header destination to the receiving backbone |
401 | * gws mac | |
23721387 | 402 | */ |
8fdd0153 AQ |
403 | ether_addr_copy(hw_src, mac); |
404 | ether_addr_copy(ethhdr->h_dest, mac); | |
39c75a51 | 405 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
eb2deb6b | 406 | "bla_send_claim(): REQUEST of %pM to %pM on vid %d\n", |
5f80df67 AQ |
407 | ethhdr->h_source, ethhdr->h_dest, |
408 | BATADV_PRINT_VID(vid)); | |
23721387 | 409 | break; |
23721387 SW |
410 | } |
411 | ||
eb2deb6b AQ |
412 | if (vid & BATADV_VLAN_HAS_TAG) |
413 | skb = vlan_insert_tag(skb, htons(ETH_P_8021Q), | |
414 | vid & VLAN_VID_MASK); | |
23721387 SW |
415 | |
416 | skb_reset_mac_header(skb); | |
417 | skb->protocol = eth_type_trans(skb, soft_iface); | |
1c9b0550 ML |
418 | batadv_inc_counter(bat_priv, BATADV_CNT_RX); |
419 | batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES, | |
420 | skb->len + ETH_HLEN); | |
23721387 SW |
421 | soft_iface->last_rx = jiffies; |
422 | ||
423 | netif_rx(skb); | |
424 | out: | |
425 | if (primary_if) | |
82047ad7 | 426 | batadv_hardif_put(primary_if); |
23721387 SW |
427 | } |
428 | ||
2c53040f | 429 | /** |
04e14be6 | 430 | * batadv_bla_get_backbone_gw - finds or creates a backbone gateway |
2c53040f | 431 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
432 | * @orig: the mac address of the originator |
433 | * @vid: the VLAN ID | |
e3357189 | 434 | * @own_backbone: set if the requested backbone is local |
23721387 | 435 | * |
04e14be6 | 436 | * Return: the (possibly created) backbone gateway or NULL on error |
23721387 | 437 | */ |
bae98774 | 438 | static struct batadv_bla_backbone_gw * |
6b5e971a | 439 | batadv_bla_get_backbone_gw(struct batadv_priv *bat_priv, u8 *orig, |
eb2deb6b | 440 | unsigned short vid, bool own_backbone) |
23721387 | 441 | { |
bae98774 | 442 | struct batadv_bla_backbone_gw *entry; |
56303d34 | 443 | struct batadv_orig_node *orig_node; |
23721387 SW |
444 | int hash_added; |
445 | ||
3b300de3 | 446 | entry = batadv_backbone_hash_find(bat_priv, orig, vid); |
23721387 SW |
447 | |
448 | if (entry) | |
449 | return entry; | |
450 | ||
39c75a51 | 451 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 452 | "bla_get_backbone_gw(): not found (%pM, %d), creating new entry\n", |
5f80df67 | 453 | orig, BATADV_PRINT_VID(vid)); |
23721387 SW |
454 | |
455 | entry = kzalloc(sizeof(*entry), GFP_ATOMIC); | |
456 | if (!entry) | |
457 | return NULL; | |
458 | ||
459 | entry->vid = vid; | |
460 | entry->lasttime = jiffies; | |
3964f728 | 461 | entry->crc = BATADV_BLA_CRC_INIT; |
23721387 | 462 | entry->bat_priv = bat_priv; |
5a1dd8a4 | 463 | spin_lock_init(&entry->crc_lock); |
23721387 | 464 | atomic_set(&entry->request_sent, 0); |
28709878 | 465 | atomic_set(&entry->wait_periods, 0); |
8fdd0153 | 466 | ether_addr_copy(entry->orig, orig); |
23721387 SW |
467 | |
468 | /* one for the hash, one for returning */ | |
06e56ded SE |
469 | kref_init(&entry->refcount); |
470 | kref_get(&entry->refcount); | |
23721387 | 471 | |
807736f6 | 472 | hash_added = batadv_hash_add(bat_priv->bla.backbone_hash, |
3b300de3 SE |
473 | batadv_compare_backbone_gw, |
474 | batadv_choose_backbone_gw, entry, | |
475 | &entry->hash_entry); | |
23721387 SW |
476 | |
477 | if (unlikely(hash_added != 0)) { | |
478 | /* hash failed, free the structure */ | |
479 | kfree(entry); | |
480 | return NULL; | |
481 | } | |
482 | ||
95fb130d | 483 | /* this is a gateway now, remove any TT entry on this VLAN */ |
da641193 | 484 | orig_node = batadv_orig_hash_find(bat_priv, orig); |
20ff9d59 | 485 | if (orig_node) { |
95fb130d | 486 | batadv_tt_global_del_orig(bat_priv, orig_node, vid, |
08c36d3e | 487 | "became a backbone gateway"); |
5d967310 | 488 | batadv_orig_node_put(orig_node); |
20ff9d59 | 489 | } |
52aebd6a | 490 | |
d807f272 | 491 | if (own_backbone) { |
52aebd6a SW |
492 | batadv_bla_send_announce(bat_priv, entry); |
493 | ||
d807f272 SW |
494 | /* this will be decreased in the worker thread */ |
495 | atomic_inc(&entry->request_sent); | |
28709878 | 496 | atomic_set(&entry->wait_periods, BATADV_BLA_WAIT_PERIODS); |
d807f272 SW |
497 | atomic_inc(&bat_priv->bla.num_requests); |
498 | } | |
499 | ||
23721387 SW |
500 | return entry; |
501 | } | |
502 | ||
04e14be6 SW |
503 | /** |
504 | * batadv_bla_update_own_backbone_gw - updates the own backbone gw for a VLAN | |
505 | * @bat_priv: the bat priv with all the soft interface information | |
506 | * @primary_if: the selected primary interface | |
507 | * @vid: VLAN identifier | |
508 | * | |
509 | * update or add the own backbone gw to make sure we announce | |
23721387 SW |
510 | * where we receive other backbone gws |
511 | */ | |
56303d34 SE |
512 | static void |
513 | batadv_bla_update_own_backbone_gw(struct batadv_priv *bat_priv, | |
514 | struct batadv_hard_iface *primary_if, | |
eb2deb6b | 515 | unsigned short vid) |
23721387 | 516 | { |
bae98774 | 517 | struct batadv_bla_backbone_gw *backbone_gw; |
23721387 | 518 | |
3b300de3 SE |
519 | backbone_gw = batadv_bla_get_backbone_gw(bat_priv, |
520 | primary_if->net_dev->dev_addr, | |
52aebd6a | 521 | vid, true); |
23721387 SW |
522 | if (unlikely(!backbone_gw)) |
523 | return; | |
524 | ||
525 | backbone_gw->lasttime = jiffies; | |
c8b86c12 | 526 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
527 | } |
528 | ||
1b371d13 SW |
529 | /** |
530 | * batadv_bla_answer_request - answer a bla request by sending own claims | |
531 | * @bat_priv: the bat priv with all the soft interface information | |
e3357189 | 532 | * @primary_if: interface where the request came on |
23721387 SW |
533 | * @vid: the vid where the request came on |
534 | * | |
535 | * Repeat all of our own claims, and finally send an ANNOUNCE frame | |
536 | * to allow the requester another check if the CRC is correct now. | |
537 | */ | |
56303d34 SE |
538 | static void batadv_bla_answer_request(struct batadv_priv *bat_priv, |
539 | struct batadv_hard_iface *primary_if, | |
eb2deb6b | 540 | unsigned short vid) |
23721387 | 541 | { |
23721387 | 542 | struct hlist_head *head; |
5bf74e9c | 543 | struct batadv_hashtable *hash; |
712bbfe4 | 544 | struct batadv_bla_claim *claim; |
bae98774 | 545 | struct batadv_bla_backbone_gw *backbone_gw; |
23721387 SW |
546 | int i; |
547 | ||
39c75a51 | 548 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 549 | "bla_answer_request(): received a claim request, send all of our own claims again\n"); |
23721387 | 550 | |
3b300de3 SE |
551 | backbone_gw = batadv_backbone_hash_find(bat_priv, |
552 | primary_if->net_dev->dev_addr, | |
553 | vid); | |
23721387 SW |
554 | if (!backbone_gw) |
555 | return; | |
556 | ||
807736f6 | 557 | hash = bat_priv->bla.claim_hash; |
23721387 SW |
558 | for (i = 0; i < hash->size; i++) { |
559 | head = &hash->table[i]; | |
560 | ||
561 | rcu_read_lock(); | |
b67bfe0d | 562 | hlist_for_each_entry_rcu(claim, head, hash_entry) { |
23721387 SW |
563 | /* only own claims are interesting */ |
564 | if (claim->backbone_gw != backbone_gw) | |
565 | continue; | |
566 | ||
3b300de3 | 567 | batadv_bla_send_claim(bat_priv, claim->addr, claim->vid, |
3eb8773e | 568 | BATADV_CLAIM_TYPE_CLAIM); |
23721387 SW |
569 | } |
570 | rcu_read_unlock(); | |
571 | } | |
572 | ||
573 | /* finally, send an announcement frame */ | |
3b300de3 | 574 | batadv_bla_send_announce(bat_priv, backbone_gw); |
c8b86c12 | 575 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
576 | } |
577 | ||
1b371d13 SW |
578 | /** |
579 | * batadv_bla_send_request - send a request to repeat claims | |
580 | * @backbone_gw: the backbone gateway from whom we are out of sync | |
23721387 SW |
581 | * |
582 | * When the crc is wrong, ask the backbone gateway for a full table update. | |
583 | * After the request, it will repeat all of his own claims and finally | |
584 | * send an announcement claim with which we can check again. | |
585 | */ | |
bae98774 | 586 | static void batadv_bla_send_request(struct batadv_bla_backbone_gw *backbone_gw) |
23721387 SW |
587 | { |
588 | /* first, remove all old entries */ | |
3b300de3 | 589 | batadv_bla_del_backbone_claims(backbone_gw); |
23721387 | 590 | |
39c75a51 SE |
591 | batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv, |
592 | "Sending REQUEST to %pM\n", backbone_gw->orig); | |
23721387 SW |
593 | |
594 | /* send request */ | |
3b300de3 | 595 | batadv_bla_send_claim(backbone_gw->bat_priv, backbone_gw->orig, |
acd34afa | 596 | backbone_gw->vid, BATADV_CLAIM_TYPE_REQUEST); |
23721387 SW |
597 | |
598 | /* no local broadcasts should be sent or received, for now. */ | |
599 | if (!atomic_read(&backbone_gw->request_sent)) { | |
807736f6 | 600 | atomic_inc(&backbone_gw->bat_priv->bla.num_requests); |
23721387 SW |
601 | atomic_set(&backbone_gw->request_sent, 1); |
602 | } | |
603 | } | |
604 | ||
1b371d13 | 605 | /** |
04e14be6 | 606 | * batadv_bla_send_announce - Send an announcement frame |
1b371d13 | 607 | * @bat_priv: the bat priv with all the soft interface information |
23721387 | 608 | * @backbone_gw: our backbone gateway which should be announced |
23721387 | 609 | */ |
56303d34 | 610 | static void batadv_bla_send_announce(struct batadv_priv *bat_priv, |
bae98774 | 611 | struct batadv_bla_backbone_gw *backbone_gw) |
23721387 | 612 | { |
6b5e971a | 613 | u8 mac[ETH_ALEN]; |
3e2f1a1b | 614 | __be16 crc; |
23721387 | 615 | |
3b300de3 | 616 | memcpy(mac, batadv_announce_mac, 4); |
5a1dd8a4 | 617 | spin_lock_bh(&backbone_gw->crc_lock); |
23721387 | 618 | crc = htons(backbone_gw->crc); |
5a1dd8a4 | 619 | spin_unlock_bh(&backbone_gw->crc_lock); |
1a5852d8 | 620 | memcpy(&mac[4], &crc, 2); |
23721387 | 621 | |
3b300de3 | 622 | batadv_bla_send_claim(bat_priv, mac, backbone_gw->vid, |
acd34afa | 623 | BATADV_CLAIM_TYPE_ANNOUNCE); |
23721387 SW |
624 | } |
625 | ||
2c53040f BH |
626 | /** |
627 | * batadv_bla_add_claim - Adds a claim in the claim hash | |
628 | * @bat_priv: the bat priv with all the soft interface information | |
23721387 SW |
629 | * @mac: the mac address of the claim |
630 | * @vid: the VLAN ID of the frame | |
631 | * @backbone_gw: the backbone gateway which claims it | |
23721387 | 632 | */ |
56303d34 | 633 | static void batadv_bla_add_claim(struct batadv_priv *bat_priv, |
6b5e971a | 634 | const u8 *mac, const unsigned short vid, |
bae98774 | 635 | struct batadv_bla_backbone_gw *backbone_gw) |
23721387 | 636 | { |
712bbfe4 ML |
637 | struct batadv_bla_claim *claim; |
638 | struct batadv_bla_claim search_claim; | |
23721387 SW |
639 | int hash_added; |
640 | ||
8fdd0153 | 641 | ether_addr_copy(search_claim.addr, mac); |
23721387 | 642 | search_claim.vid = vid; |
3b300de3 | 643 | claim = batadv_claim_hash_find(bat_priv, &search_claim); |
23721387 SW |
644 | |
645 | /* create a new claim entry if it does not exist yet. */ | |
646 | if (!claim) { | |
647 | claim = kzalloc(sizeof(*claim), GFP_ATOMIC); | |
648 | if (!claim) | |
649 | return; | |
650 | ||
8fdd0153 | 651 | ether_addr_copy(claim->addr, mac); |
23721387 SW |
652 | claim->vid = vid; |
653 | claim->lasttime = jiffies; | |
654 | claim->backbone_gw = backbone_gw; | |
655 | ||
71b7e3d3 SE |
656 | kref_init(&claim->refcount); |
657 | kref_get(&claim->refcount); | |
39c75a51 | 658 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 659 | "bla_add_claim(): adding new entry %pM, vid %d to hash ...\n", |
5f80df67 | 660 | mac, BATADV_PRINT_VID(vid)); |
807736f6 | 661 | hash_added = batadv_hash_add(bat_priv->bla.claim_hash, |
3b300de3 SE |
662 | batadv_compare_claim, |
663 | batadv_choose_claim, claim, | |
664 | &claim->hash_entry); | |
23721387 SW |
665 | |
666 | if (unlikely(hash_added != 0)) { | |
667 | /* only local changes happened. */ | |
668 | kfree(claim); | |
669 | return; | |
670 | } | |
671 | } else { | |
672 | claim->lasttime = jiffies; | |
673 | if (claim->backbone_gw == backbone_gw) | |
674 | /* no need to register a new backbone */ | |
675 | goto claim_free_ref; | |
676 | ||
39c75a51 | 677 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 678 | "bla_add_claim(): changing ownership for %pM, vid %d\n", |
5f80df67 | 679 | mac, BATADV_PRINT_VID(vid)); |
23721387 | 680 | |
5a1dd8a4 | 681 | spin_lock_bh(&claim->backbone_gw->crc_lock); |
bbb1f90e | 682 | claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN); |
5a1dd8a4 | 683 | spin_unlock_bh(&claim->backbone_gw->crc_lock); |
c8b86c12 | 684 | batadv_backbone_gw_put(claim->backbone_gw); |
23721387 SW |
685 | } |
686 | /* set (new) backbone gw */ | |
06e56ded | 687 | kref_get(&backbone_gw->refcount); |
23721387 SW |
688 | claim->backbone_gw = backbone_gw; |
689 | ||
5a1dd8a4 | 690 | spin_lock_bh(&backbone_gw->crc_lock); |
23721387 | 691 | backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN); |
5a1dd8a4 | 692 | spin_unlock_bh(&backbone_gw->crc_lock); |
23721387 SW |
693 | backbone_gw->lasttime = jiffies; |
694 | ||
695 | claim_free_ref: | |
321e3e08 | 696 | batadv_claim_put(claim); |
23721387 SW |
697 | } |
698 | ||
04e14be6 SW |
699 | /** |
700 | * batadv_bla_del_claim - delete a claim from the claim hash | |
701 | * @bat_priv: the bat priv with all the soft interface information | |
702 | * @mac: mac address of the claim to be removed | |
703 | * @vid: VLAN id for the claim to be removed | |
23721387 | 704 | */ |
56303d34 | 705 | static void batadv_bla_del_claim(struct batadv_priv *bat_priv, |
6b5e971a | 706 | const u8 *mac, const unsigned short vid) |
23721387 | 707 | { |
712bbfe4 | 708 | struct batadv_bla_claim search_claim, *claim; |
23721387 | 709 | |
8fdd0153 | 710 | ether_addr_copy(search_claim.addr, mac); |
23721387 | 711 | search_claim.vid = vid; |
3b300de3 | 712 | claim = batadv_claim_hash_find(bat_priv, &search_claim); |
23721387 SW |
713 | if (!claim) |
714 | return; | |
715 | ||
39c75a51 | 716 | batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla_del_claim(): %pM, vid %d\n", |
5f80df67 | 717 | mac, BATADV_PRINT_VID(vid)); |
23721387 | 718 | |
807736f6 | 719 | batadv_hash_remove(bat_priv->bla.claim_hash, batadv_compare_claim, |
3b300de3 | 720 | batadv_choose_claim, claim); |
321e3e08 | 721 | batadv_claim_put(claim); /* reference from the hash is gone */ |
23721387 | 722 | |
5a1dd8a4 | 723 | spin_lock_bh(&claim->backbone_gw->crc_lock); |
23721387 | 724 | claim->backbone_gw->crc ^= crc16(0, claim->addr, ETH_ALEN); |
5a1dd8a4 | 725 | spin_unlock_bh(&claim->backbone_gw->crc_lock); |
23721387 SW |
726 | |
727 | /* don't need the reference from hash_find() anymore */ | |
321e3e08 | 728 | batadv_claim_put(claim); |
23721387 SW |
729 | } |
730 | ||
62fe710f SE |
731 | /** |
732 | * batadv_handle_announce - check for ANNOUNCE frame | |
04e14be6 SW |
733 | * @bat_priv: the bat priv with all the soft interface information |
734 | * @an_addr: announcement mac address (ARP Sender HW address) | |
735 | * @backbone_addr: originator address of the sender (Ethernet source MAC) | |
736 | * @vid: the VLAN ID of the frame | |
62fe710f SE |
737 | * |
738 | * Return: 1 if handled | |
739 | */ | |
6b5e971a SE |
740 | static int batadv_handle_announce(struct batadv_priv *bat_priv, u8 *an_addr, |
741 | u8 *backbone_addr, unsigned short vid) | |
23721387 | 742 | { |
bae98774 | 743 | struct batadv_bla_backbone_gw *backbone_gw; |
5a1dd8a4 | 744 | u16 backbone_crc, crc; |
23721387 | 745 | |
3b300de3 | 746 | if (memcmp(an_addr, batadv_announce_mac, 4) != 0) |
23721387 SW |
747 | return 0; |
748 | ||
52aebd6a SW |
749 | backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid, |
750 | false); | |
23721387 SW |
751 | |
752 | if (unlikely(!backbone_gw)) | |
753 | return 1; | |
754 | ||
23721387 SW |
755 | /* handle as ANNOUNCE frame */ |
756 | backbone_gw->lasttime = jiffies; | |
3e2f1a1b | 757 | crc = ntohs(*((__be16 *)(&an_addr[4]))); |
23721387 | 758 | |
39c75a51 | 759 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
39a32991 | 760 | "handle_announce(): ANNOUNCE vid %d (sent by %pM)... CRC = %#.4x\n", |
5f80df67 | 761 | BATADV_PRINT_VID(vid), backbone_gw->orig, crc); |
23721387 | 762 | |
5a1dd8a4 SW |
763 | spin_lock_bh(&backbone_gw->crc_lock); |
764 | backbone_crc = backbone_gw->crc; | |
765 | spin_unlock_bh(&backbone_gw->crc_lock); | |
766 | ||
767 | if (backbone_crc != crc) { | |
39c75a51 | 768 | batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv, |
39a32991 | 769 | "handle_announce(): CRC FAILED for %pM/%d (my = %#.4x, sent = %#.4x)\n", |
5f80df67 AQ |
770 | backbone_gw->orig, |
771 | BATADV_PRINT_VID(backbone_gw->vid), | |
5a1dd8a4 | 772 | backbone_crc, crc); |
23721387 | 773 | |
3b300de3 | 774 | batadv_bla_send_request(backbone_gw); |
23721387 SW |
775 | } else { |
776 | /* if we have sent a request and the crc was OK, | |
777 | * we can allow traffic again. | |
778 | */ | |
779 | if (atomic_read(&backbone_gw->request_sent)) { | |
807736f6 | 780 | atomic_dec(&backbone_gw->bat_priv->bla.num_requests); |
23721387 SW |
781 | atomic_set(&backbone_gw->request_sent, 0); |
782 | } | |
783 | } | |
784 | ||
c8b86c12 | 785 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
786 | return 1; |
787 | } | |
788 | ||
62fe710f SE |
789 | /** |
790 | * batadv_handle_request - check for REQUEST frame | |
04e14be6 SW |
791 | * @bat_priv: the bat priv with all the soft interface information |
792 | * @primary_if: the primary hard interface of this batman soft interface | |
793 | * @backbone_addr: backbone address to be requested (ARP sender HW MAC) | |
794 | * @ethhdr: ethernet header of a packet | |
795 | * @vid: the VLAN ID of the frame | |
62fe710f SE |
796 | * |
797 | * Return: 1 if handled | |
798 | */ | |
56303d34 SE |
799 | static int batadv_handle_request(struct batadv_priv *bat_priv, |
800 | struct batadv_hard_iface *primary_if, | |
6b5e971a SE |
801 | u8 *backbone_addr, struct ethhdr *ethhdr, |
802 | unsigned short vid) | |
23721387 SW |
803 | { |
804 | /* check for REQUEST frame */ | |
1eda58bf | 805 | if (!batadv_compare_eth(backbone_addr, ethhdr->h_dest)) |
23721387 SW |
806 | return 0; |
807 | ||
808 | /* sanity check, this should not happen on a normal switch, | |
809 | * we ignore it in this case. | |
810 | */ | |
1eda58bf | 811 | if (!batadv_compare_eth(ethhdr->h_dest, primary_if->net_dev->dev_addr)) |
23721387 SW |
812 | return 1; |
813 | ||
39c75a51 | 814 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 815 | "handle_request(): REQUEST vid %d (sent by %pM)...\n", |
5f80df67 | 816 | BATADV_PRINT_VID(vid), ethhdr->h_source); |
23721387 | 817 | |
3b300de3 | 818 | batadv_bla_answer_request(bat_priv, primary_if, vid); |
23721387 SW |
819 | return 1; |
820 | } | |
821 | ||
62fe710f SE |
822 | /** |
823 | * batadv_handle_unclaim - check for UNCLAIM frame | |
04e14be6 SW |
824 | * @bat_priv: the bat priv with all the soft interface information |
825 | * @primary_if: the primary hard interface of this batman soft interface | |
826 | * @backbone_addr: originator address of the backbone (Ethernet source) | |
827 | * @claim_addr: Client to be unclaimed (ARP sender HW MAC) | |
828 | * @vid: the VLAN ID of the frame | |
62fe710f SE |
829 | * |
830 | * Return: 1 if handled | |
831 | */ | |
56303d34 SE |
832 | static int batadv_handle_unclaim(struct batadv_priv *bat_priv, |
833 | struct batadv_hard_iface *primary_if, | |
6b5e971a SE |
834 | u8 *backbone_addr, u8 *claim_addr, |
835 | unsigned short vid) | |
23721387 | 836 | { |
bae98774 | 837 | struct batadv_bla_backbone_gw *backbone_gw; |
23721387 SW |
838 | |
839 | /* unclaim in any case if it is our own */ | |
1eda58bf SE |
840 | if (primary_if && batadv_compare_eth(backbone_addr, |
841 | primary_if->net_dev->dev_addr)) | |
3b300de3 | 842 | batadv_bla_send_claim(bat_priv, claim_addr, vid, |
3eb8773e | 843 | BATADV_CLAIM_TYPE_UNCLAIM); |
23721387 | 844 | |
3b300de3 | 845 | backbone_gw = batadv_backbone_hash_find(bat_priv, backbone_addr, vid); |
23721387 SW |
846 | |
847 | if (!backbone_gw) | |
848 | return 1; | |
849 | ||
850 | /* this must be an UNCLAIM frame */ | |
39c75a51 | 851 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 852 | "handle_unclaim(): UNCLAIM %pM on vid %d (sent by %pM)...\n", |
5f80df67 | 853 | claim_addr, BATADV_PRINT_VID(vid), backbone_gw->orig); |
23721387 | 854 | |
3b300de3 | 855 | batadv_bla_del_claim(bat_priv, claim_addr, vid); |
c8b86c12 | 856 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
857 | return 1; |
858 | } | |
859 | ||
62fe710f SE |
860 | /** |
861 | * batadv_handle_claim - check for CLAIM frame | |
04e14be6 SW |
862 | * @bat_priv: the bat priv with all the soft interface information |
863 | * @primary_if: the primary hard interface of this batman soft interface | |
864 | * @backbone_addr: originator address of the backbone (Ethernet Source) | |
865 | * @claim_addr: client mac address to be claimed (ARP sender HW MAC) | |
866 | * @vid: the VLAN ID of the frame | |
62fe710f SE |
867 | * |
868 | * Return: 1 if handled | |
869 | */ | |
56303d34 SE |
870 | static int batadv_handle_claim(struct batadv_priv *bat_priv, |
871 | struct batadv_hard_iface *primary_if, | |
6b5e971a | 872 | u8 *backbone_addr, u8 *claim_addr, |
eb2deb6b | 873 | unsigned short vid) |
23721387 | 874 | { |
bae98774 | 875 | struct batadv_bla_backbone_gw *backbone_gw; |
23721387 SW |
876 | |
877 | /* register the gateway if not yet available, and add the claim. */ | |
878 | ||
52aebd6a SW |
879 | backbone_gw = batadv_bla_get_backbone_gw(bat_priv, backbone_addr, vid, |
880 | false); | |
23721387 SW |
881 | |
882 | if (unlikely(!backbone_gw)) | |
883 | return 1; | |
884 | ||
885 | /* this must be a CLAIM frame */ | |
3b300de3 | 886 | batadv_bla_add_claim(bat_priv, claim_addr, vid, backbone_gw); |
1eda58bf | 887 | if (batadv_compare_eth(backbone_addr, primary_if->net_dev->dev_addr)) |
3b300de3 | 888 | batadv_bla_send_claim(bat_priv, claim_addr, vid, |
3eb8773e | 889 | BATADV_CLAIM_TYPE_CLAIM); |
23721387 SW |
890 | |
891 | /* TODO: we could call something like tt_local_del() here. */ | |
892 | ||
c8b86c12 | 893 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
894 | return 1; |
895 | } | |
896 | ||
2c53040f | 897 | /** |
04e14be6 | 898 | * batadv_check_claim_group - check for claim group membership |
2c53040f | 899 | * @bat_priv: the bat priv with all the soft interface information |
e3357189 | 900 | * @primary_if: the primary interface of this batman interface |
38ef3d1d SW |
901 | * @hw_src: the Hardware source in the ARP Header |
902 | * @hw_dst: the Hardware destination in the ARP Header | |
903 | * @ethhdr: pointer to the Ethernet header of the claim frame | |
904 | * | |
905 | * checks if it is a claim packet and if its on the same group. | |
906 | * This function also applies the group ID of the sender | |
907 | * if it is in the same mesh. | |
908 | * | |
62fe710f | 909 | * Return: |
38ef3d1d SW |
910 | * 2 - if it is a claim packet and on the same group |
911 | * 1 - if is a claim packet from another group | |
912 | * 0 - if it is not a claim packet | |
913 | */ | |
56303d34 SE |
914 | static int batadv_check_claim_group(struct batadv_priv *bat_priv, |
915 | struct batadv_hard_iface *primary_if, | |
6b5e971a | 916 | u8 *hw_src, u8 *hw_dst, |
3b300de3 | 917 | struct ethhdr *ethhdr) |
38ef3d1d | 918 | { |
6b5e971a | 919 | u8 *backbone_addr; |
56303d34 | 920 | struct batadv_orig_node *orig_node; |
96412690 | 921 | struct batadv_bla_claim_dst *bla_dst, *bla_dst_own; |
38ef3d1d | 922 | |
96412690 | 923 | bla_dst = (struct batadv_bla_claim_dst *)hw_dst; |
807736f6 | 924 | bla_dst_own = &bat_priv->bla.claim_dest; |
38ef3d1d | 925 | |
38ef3d1d SW |
926 | /* if announcement packet, use the source, |
927 | * otherwise assume it is in the hw_src | |
928 | */ | |
929 | switch (bla_dst->type) { | |
3eb8773e | 930 | case BATADV_CLAIM_TYPE_CLAIM: |
38ef3d1d SW |
931 | backbone_addr = hw_src; |
932 | break; | |
acd34afa SE |
933 | case BATADV_CLAIM_TYPE_REQUEST: |
934 | case BATADV_CLAIM_TYPE_ANNOUNCE: | |
3eb8773e | 935 | case BATADV_CLAIM_TYPE_UNCLAIM: |
38ef3d1d SW |
936 | backbone_addr = ethhdr->h_source; |
937 | break; | |
938 | default: | |
939 | return 0; | |
940 | } | |
941 | ||
942 | /* don't accept claim frames from ourselves */ | |
1eda58bf | 943 | if (batadv_compare_eth(backbone_addr, primary_if->net_dev->dev_addr)) |
38ef3d1d SW |
944 | return 0; |
945 | ||
946 | /* if its already the same group, it is fine. */ | |
947 | if (bla_dst->group == bla_dst_own->group) | |
948 | return 2; | |
949 | ||
950 | /* lets see if this originator is in our mesh */ | |
da641193 | 951 | orig_node = batadv_orig_hash_find(bat_priv, backbone_addr); |
38ef3d1d SW |
952 | |
953 | /* dont accept claims from gateways which are not in | |
954 | * the same mesh or group. | |
955 | */ | |
956 | if (!orig_node) | |
957 | return 1; | |
958 | ||
959 | /* if our mesh friends mac is bigger, use it for ourselves. */ | |
960 | if (ntohs(bla_dst->group) > ntohs(bla_dst_own->group)) { | |
39c75a51 | 961 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
39a32991 | 962 | "taking other backbones claim group: %#.4x\n", |
1eda58bf | 963 | ntohs(bla_dst->group)); |
38ef3d1d SW |
964 | bla_dst_own->group = bla_dst->group; |
965 | } | |
966 | ||
5d967310 | 967 | batadv_orig_node_put(orig_node); |
38ef3d1d SW |
968 | |
969 | return 2; | |
970 | } | |
971 | ||
1b371d13 | 972 | /** |
04e14be6 | 973 | * batadv_bla_process_claim - Check if this is a claim frame, and process it |
1b371d13 | 974 | * @bat_priv: the bat priv with all the soft interface information |
e3357189 | 975 | * @primary_if: the primary hard interface of this batman soft interface |
23721387 SW |
976 | * @skb: the frame to be checked |
977 | * | |
62fe710f | 978 | * Return: 1 if it was a claim frame, otherwise return 0 to |
23721387 SW |
979 | * tell the callee that it can use the frame on its own. |
980 | */ | |
56303d34 SE |
981 | static int batadv_bla_process_claim(struct batadv_priv *bat_priv, |
982 | struct batadv_hard_iface *primary_if, | |
3b300de3 | 983 | struct sk_buff *skb) |
23721387 | 984 | { |
d46b6bfa | 985 | struct batadv_bla_claim_dst *bla_dst, *bla_dst_own; |
6b5e971a | 986 | u8 *hw_src, *hw_dst; |
d46b6bfa | 987 | struct vlan_hdr *vhdr, vhdr_buf; |
c018ad3d | 988 | struct ethhdr *ethhdr; |
23721387 | 989 | struct arphdr *arphdr; |
c018ad3d | 990 | unsigned short vid; |
d46b6bfa | 991 | int vlan_depth = 0; |
293e9338 | 992 | __be16 proto; |
23721387 | 993 | int headlen; |
38ef3d1d | 994 | int ret; |
23721387 | 995 | |
c018ad3d | 996 | vid = batadv_get_vid(skb, 0); |
7ed4be95 | 997 | ethhdr = eth_hdr(skb); |
23721387 | 998 | |
c018ad3d AQ |
999 | proto = ethhdr->h_proto; |
1000 | headlen = ETH_HLEN; | |
1001 | if (vid & BATADV_VLAN_HAS_TAG) { | |
d46b6bfa SW |
1002 | /* Traverse the VLAN/Ethertypes. |
1003 | * | |
1004 | * At this point it is known that the first protocol is a VLAN | |
1005 | * header, so start checking at the encapsulated protocol. | |
1006 | * | |
1007 | * The depth of the VLAN headers is recorded to drop BLA claim | |
1008 | * frames encapsulated into multiple VLAN headers (QinQ). | |
1009 | */ | |
1010 | do { | |
1011 | vhdr = skb_header_pointer(skb, headlen, VLAN_HLEN, | |
1012 | &vhdr_buf); | |
1013 | if (!vhdr) | |
1014 | return 0; | |
1015 | ||
1016 | proto = vhdr->h_vlan_encapsulated_proto; | |
1017 | headlen += VLAN_HLEN; | |
1018 | vlan_depth++; | |
1019 | } while (proto == htons(ETH_P_8021Q)); | |
23721387 SW |
1020 | } |
1021 | ||
293e9338 | 1022 | if (proto != htons(ETH_P_ARP)) |
23721387 SW |
1023 | return 0; /* not a claim frame */ |
1024 | ||
1025 | /* this must be a ARP frame. check if it is a claim. */ | |
1026 | ||
1027 | if (unlikely(!pskb_may_pull(skb, headlen + arp_hdr_len(skb->dev)))) | |
1028 | return 0; | |
1029 | ||
1030 | /* pskb_may_pull() may have modified the pointers, get ethhdr again */ | |
7ed4be95 | 1031 | ethhdr = eth_hdr(skb); |
6b5e971a | 1032 | arphdr = (struct arphdr *)((u8 *)ethhdr + headlen); |
23721387 SW |
1033 | |
1034 | /* Check whether the ARP frame carries a valid | |
1035 | * IP information | |
1036 | */ | |
23721387 SW |
1037 | if (arphdr->ar_hrd != htons(ARPHRD_ETHER)) |
1038 | return 0; | |
1039 | if (arphdr->ar_pro != htons(ETH_P_IP)) | |
1040 | return 0; | |
1041 | if (arphdr->ar_hln != ETH_ALEN) | |
1042 | return 0; | |
1043 | if (arphdr->ar_pln != 4) | |
1044 | return 0; | |
1045 | ||
6b5e971a | 1046 | hw_src = (u8 *)arphdr + sizeof(struct arphdr); |
23721387 | 1047 | hw_dst = hw_src + ETH_ALEN + 4; |
96412690 | 1048 | bla_dst = (struct batadv_bla_claim_dst *)hw_dst; |
d46b6bfa SW |
1049 | bla_dst_own = &bat_priv->bla.claim_dest; |
1050 | ||
1051 | /* check if it is a claim frame in general */ | |
1052 | if (memcmp(bla_dst->magic, bla_dst_own->magic, | |
1053 | sizeof(bla_dst->magic)) != 0) | |
1054 | return 0; | |
1055 | ||
1056 | /* check if there is a claim frame encapsulated deeper in (QinQ) and | |
1057 | * drop that, as this is not supported by BLA but should also not be | |
1058 | * sent via the mesh. | |
1059 | */ | |
1060 | if (vlan_depth > 1) | |
1061 | return 1; | |
23721387 SW |
1062 | |
1063 | /* check if it is a claim frame. */ | |
3b300de3 SE |
1064 | ret = batadv_check_claim_group(bat_priv, primary_if, hw_src, hw_dst, |
1065 | ethhdr); | |
38ef3d1d | 1066 | if (ret == 1) |
39c75a51 | 1067 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 1068 | "bla_process_claim(): received a claim frame from another group. From: %pM on vid %d ...(hw_src %pM, hw_dst %pM)\n", |
5f80df67 AQ |
1069 | ethhdr->h_source, BATADV_PRINT_VID(vid), hw_src, |
1070 | hw_dst); | |
38ef3d1d SW |
1071 | |
1072 | if (ret < 2) | |
1073 | return ret; | |
23721387 SW |
1074 | |
1075 | /* become a backbone gw ourselves on this vlan if not happened yet */ | |
3b300de3 | 1076 | batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid); |
23721387 SW |
1077 | |
1078 | /* check for the different types of claim frames ... */ | |
1079 | switch (bla_dst->type) { | |
3eb8773e | 1080 | case BATADV_CLAIM_TYPE_CLAIM: |
3b300de3 SE |
1081 | if (batadv_handle_claim(bat_priv, primary_if, hw_src, |
1082 | ethhdr->h_source, vid)) | |
23721387 SW |
1083 | return 1; |
1084 | break; | |
3eb8773e | 1085 | case BATADV_CLAIM_TYPE_UNCLAIM: |
3b300de3 SE |
1086 | if (batadv_handle_unclaim(bat_priv, primary_if, |
1087 | ethhdr->h_source, hw_src, vid)) | |
23721387 SW |
1088 | return 1; |
1089 | break; | |
1090 | ||
acd34afa | 1091 | case BATADV_CLAIM_TYPE_ANNOUNCE: |
3b300de3 SE |
1092 | if (batadv_handle_announce(bat_priv, hw_src, ethhdr->h_source, |
1093 | vid)) | |
23721387 SW |
1094 | return 1; |
1095 | break; | |
acd34afa | 1096 | case BATADV_CLAIM_TYPE_REQUEST: |
3b300de3 SE |
1097 | if (batadv_handle_request(bat_priv, primary_if, hw_src, ethhdr, |
1098 | vid)) | |
23721387 SW |
1099 | return 1; |
1100 | break; | |
1101 | } | |
1102 | ||
39c75a51 | 1103 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf | 1104 | "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", |
5f80df67 | 1105 | ethhdr->h_source, BATADV_PRINT_VID(vid), hw_src, hw_dst); |
23721387 SW |
1106 | return 1; |
1107 | } | |
1108 | ||
04e14be6 SW |
1109 | /** |
1110 | * batadv_bla_purge_backbone_gw - Remove backbone gateways after a timeout or | |
1111 | * immediately | |
1112 | * @bat_priv: the bat priv with all the soft interface information | |
1113 | * @now: whether the whole hash shall be wiped now | |
1114 | * | |
1115 | * Check when we last heard from other nodes, and remove them in case of | |
23721387 SW |
1116 | * a time out, or clean all backbone gws if now is set. |
1117 | */ | |
56303d34 | 1118 | static void batadv_bla_purge_backbone_gw(struct batadv_priv *bat_priv, int now) |
23721387 | 1119 | { |
bae98774 | 1120 | struct batadv_bla_backbone_gw *backbone_gw; |
b67bfe0d | 1121 | struct hlist_node *node_tmp; |
23721387 | 1122 | struct hlist_head *head; |
5bf74e9c | 1123 | struct batadv_hashtable *hash; |
23721387 SW |
1124 | spinlock_t *list_lock; /* protects write access to the hash lists */ |
1125 | int i; | |
1126 | ||
807736f6 | 1127 | hash = bat_priv->bla.backbone_hash; |
23721387 SW |
1128 | if (!hash) |
1129 | return; | |
1130 | ||
1131 | for (i = 0; i < hash->size; i++) { | |
1132 | head = &hash->table[i]; | |
1133 | list_lock = &hash->list_locks[i]; | |
1134 | ||
1135 | spin_lock_bh(list_lock); | |
b67bfe0d | 1136 | hlist_for_each_entry_safe(backbone_gw, node_tmp, |
23721387 SW |
1137 | head, hash_entry) { |
1138 | if (now) | |
1139 | goto purge_now; | |
1eda58bf | 1140 | if (!batadv_has_timed_out(backbone_gw->lasttime, |
42d0b044 | 1141 | BATADV_BLA_BACKBONE_TIMEOUT)) |
23721387 SW |
1142 | continue; |
1143 | ||
39c75a51 | 1144 | batadv_dbg(BATADV_DBG_BLA, backbone_gw->bat_priv, |
1eda58bf SE |
1145 | "bla_purge_backbone_gw(): backbone gw %pM timed out\n", |
1146 | backbone_gw->orig); | |
23721387 SW |
1147 | |
1148 | purge_now: | |
1149 | /* don't wait for the pending request anymore */ | |
1150 | if (atomic_read(&backbone_gw->request_sent)) | |
807736f6 | 1151 | atomic_dec(&bat_priv->bla.num_requests); |
23721387 | 1152 | |
3b300de3 | 1153 | batadv_bla_del_backbone_claims(backbone_gw); |
23721387 | 1154 | |
b67bfe0d | 1155 | hlist_del_rcu(&backbone_gw->hash_entry); |
c8b86c12 | 1156 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
1157 | } |
1158 | spin_unlock_bh(list_lock); | |
1159 | } | |
1160 | } | |
1161 | ||
2c53040f | 1162 | /** |
04e14be6 | 1163 | * batadv_bla_purge_claims - Remove claims after a timeout or immediately |
2c53040f | 1164 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
1165 | * @primary_if: the selected primary interface, may be NULL if now is set |
1166 | * @now: whether the whole hash shall be wiped now | |
1167 | * | |
1168 | * Check when we heard last time from our own claims, and remove them in case of | |
1169 | * a time out, or clean all claims if now is set | |
1170 | */ | |
56303d34 SE |
1171 | static void batadv_bla_purge_claims(struct batadv_priv *bat_priv, |
1172 | struct batadv_hard_iface *primary_if, | |
1173 | int now) | |
23721387 | 1174 | { |
712bbfe4 | 1175 | struct batadv_bla_claim *claim; |
23721387 | 1176 | struct hlist_head *head; |
5bf74e9c | 1177 | struct batadv_hashtable *hash; |
23721387 SW |
1178 | int i; |
1179 | ||
807736f6 | 1180 | hash = bat_priv->bla.claim_hash; |
23721387 SW |
1181 | if (!hash) |
1182 | return; | |
1183 | ||
1184 | for (i = 0; i < hash->size; i++) { | |
1185 | head = &hash->table[i]; | |
1186 | ||
1187 | rcu_read_lock(); | |
b67bfe0d | 1188 | hlist_for_each_entry_rcu(claim, head, hash_entry) { |
23721387 SW |
1189 | if (now) |
1190 | goto purge_now; | |
1eda58bf SE |
1191 | if (!batadv_compare_eth(claim->backbone_gw->orig, |
1192 | primary_if->net_dev->dev_addr)) | |
23721387 | 1193 | continue; |
1eda58bf | 1194 | if (!batadv_has_timed_out(claim->lasttime, |
42d0b044 | 1195 | BATADV_BLA_CLAIM_TIMEOUT)) |
23721387 SW |
1196 | continue; |
1197 | ||
39c75a51 | 1198 | batadv_dbg(BATADV_DBG_BLA, bat_priv, |
1eda58bf SE |
1199 | "bla_purge_claims(): %pM, vid %d, time out\n", |
1200 | claim->addr, claim->vid); | |
23721387 SW |
1201 | |
1202 | purge_now: | |
3b300de3 SE |
1203 | batadv_handle_unclaim(bat_priv, primary_if, |
1204 | claim->backbone_gw->orig, | |
1205 | claim->addr, claim->vid); | |
23721387 SW |
1206 | } |
1207 | rcu_read_unlock(); | |
1208 | } | |
1209 | } | |
1210 | ||
2c53040f | 1211 | /** |
04e14be6 SW |
1212 | * batadv_bla_update_orig_address - Update the backbone gateways when the own |
1213 | * originator address changes | |
2c53040f | 1214 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
1215 | * @primary_if: the new selected primary_if |
1216 | * @oldif: the old primary interface, may be NULL | |
23721387 | 1217 | */ |
56303d34 SE |
1218 | void batadv_bla_update_orig_address(struct batadv_priv *bat_priv, |
1219 | struct batadv_hard_iface *primary_if, | |
1220 | struct batadv_hard_iface *oldif) | |
23721387 | 1221 | { |
bae98774 | 1222 | struct batadv_bla_backbone_gw *backbone_gw; |
23721387 | 1223 | struct hlist_head *head; |
5bf74e9c | 1224 | struct batadv_hashtable *hash; |
807736f6 | 1225 | __be16 group; |
23721387 SW |
1226 | int i; |
1227 | ||
38ef3d1d | 1228 | /* reset bridge loop avoidance group id */ |
807736f6 SE |
1229 | group = htons(crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN)); |
1230 | bat_priv->bla.claim_dest.group = group; | |
38ef3d1d | 1231 | |
d5b4c93e SW |
1232 | /* purge everything when bridge loop avoidance is turned off */ |
1233 | if (!atomic_read(&bat_priv->bridge_loop_avoidance)) | |
1234 | oldif = NULL; | |
1235 | ||
23721387 | 1236 | if (!oldif) { |
3b300de3 SE |
1237 | batadv_bla_purge_claims(bat_priv, NULL, 1); |
1238 | batadv_bla_purge_backbone_gw(bat_priv, 1); | |
23721387 SW |
1239 | return; |
1240 | } | |
1241 | ||
807736f6 | 1242 | hash = bat_priv->bla.backbone_hash; |
23721387 SW |
1243 | if (!hash) |
1244 | return; | |
1245 | ||
1246 | for (i = 0; i < hash->size; i++) { | |
1247 | head = &hash->table[i]; | |
1248 | ||
1249 | rcu_read_lock(); | |
b67bfe0d | 1250 | hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) { |
23721387 | 1251 | /* own orig still holds the old value. */ |
1eda58bf SE |
1252 | if (!batadv_compare_eth(backbone_gw->orig, |
1253 | oldif->net_dev->dev_addr)) | |
23721387 SW |
1254 | continue; |
1255 | ||
8fdd0153 AQ |
1256 | ether_addr_copy(backbone_gw->orig, |
1257 | primary_if->net_dev->dev_addr); | |
23721387 SW |
1258 | /* send an announce frame so others will ask for our |
1259 | * claims and update their tables. | |
1260 | */ | |
3b300de3 | 1261 | batadv_bla_send_announce(bat_priv, backbone_gw); |
23721387 SW |
1262 | } |
1263 | rcu_read_unlock(); | |
1264 | } | |
1265 | } | |
1266 | ||
d68081a2 SW |
1267 | /** |
1268 | * batadv_bla_status_update - purge bla interfaces if necessary | |
1269 | * @net_dev: the soft interface net device | |
1270 | */ | |
1271 | void batadv_bla_status_update(struct net_device *net_dev) | |
1272 | { | |
1273 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
1274 | struct batadv_hard_iface *primary_if; | |
1275 | ||
1276 | primary_if = batadv_primary_if_get_selected(bat_priv); | |
1277 | if (!primary_if) | |
1278 | return; | |
1279 | ||
1280 | /* this function already purges everything when bla is disabled, | |
1281 | * so just call that one. | |
1282 | */ | |
1283 | batadv_bla_update_orig_address(bat_priv, primary_if, primary_if); | |
82047ad7 | 1284 | batadv_hardif_put(primary_if); |
d68081a2 SW |
1285 | } |
1286 | ||
04e14be6 SW |
1287 | /** |
1288 | * batadv_bla_periodic_work - performs periodic bla work | |
1289 | * @work: kernel work struct | |
1290 | * | |
1291 | * periodic work to do: | |
23721387 SW |
1292 | * * purge structures when they are too old |
1293 | * * send announcements | |
1294 | */ | |
3b300de3 | 1295 | static void batadv_bla_periodic_work(struct work_struct *work) |
23721387 | 1296 | { |
bbb1f90e | 1297 | struct delayed_work *delayed_work; |
56303d34 | 1298 | struct batadv_priv *bat_priv; |
807736f6 | 1299 | struct batadv_priv_bla *priv_bla; |
23721387 | 1300 | struct hlist_head *head; |
bae98774 | 1301 | struct batadv_bla_backbone_gw *backbone_gw; |
5bf74e9c | 1302 | struct batadv_hashtable *hash; |
56303d34 | 1303 | struct batadv_hard_iface *primary_if; |
23721387 SW |
1304 | int i; |
1305 | ||
4ba4bc0f | 1306 | delayed_work = to_delayed_work(work); |
807736f6 SE |
1307 | priv_bla = container_of(delayed_work, struct batadv_priv_bla, work); |
1308 | bat_priv = container_of(priv_bla, struct batadv_priv, bla); | |
e5d89254 | 1309 | primary_if = batadv_primary_if_get_selected(bat_priv); |
23721387 SW |
1310 | if (!primary_if) |
1311 | goto out; | |
1312 | ||
3b300de3 SE |
1313 | batadv_bla_purge_claims(bat_priv, primary_if, 0); |
1314 | batadv_bla_purge_backbone_gw(bat_priv, 0); | |
23721387 SW |
1315 | |
1316 | if (!atomic_read(&bat_priv->bridge_loop_avoidance)) | |
1317 | goto out; | |
1318 | ||
807736f6 | 1319 | hash = bat_priv->bla.backbone_hash; |
23721387 SW |
1320 | if (!hash) |
1321 | goto out; | |
1322 | ||
1323 | for (i = 0; i < hash->size; i++) { | |
1324 | head = &hash->table[i]; | |
1325 | ||
1326 | rcu_read_lock(); | |
b67bfe0d | 1327 | hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) { |
1eda58bf SE |
1328 | if (!batadv_compare_eth(backbone_gw->orig, |
1329 | primary_if->net_dev->dev_addr)) | |
23721387 SW |
1330 | continue; |
1331 | ||
1332 | backbone_gw->lasttime = jiffies; | |
1333 | ||
3b300de3 | 1334 | batadv_bla_send_announce(bat_priv, backbone_gw); |
d807f272 SW |
1335 | |
1336 | /* request_sent is only set after creation to avoid | |
1337 | * problems when we are not yet known as backbone gw | |
1338 | * in the backbone. | |
1339 | * | |
28709878 SW |
1340 | * We can reset this now after we waited some periods |
1341 | * to give bridge forward delays and bla group forming | |
1342 | * some grace time. | |
d807f272 SW |
1343 | */ |
1344 | ||
1345 | if (atomic_read(&backbone_gw->request_sent) == 0) | |
1346 | continue; | |
1347 | ||
28709878 SW |
1348 | if (!atomic_dec_and_test(&backbone_gw->wait_periods)) |
1349 | continue; | |
1350 | ||
d807f272 SW |
1351 | atomic_dec(&backbone_gw->bat_priv->bla.num_requests); |
1352 | atomic_set(&backbone_gw->request_sent, 0); | |
23721387 SW |
1353 | } |
1354 | rcu_read_unlock(); | |
1355 | } | |
1356 | out: | |
1357 | if (primary_if) | |
82047ad7 | 1358 | batadv_hardif_put(primary_if); |
23721387 | 1359 | |
72414442 AQ |
1360 | queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work, |
1361 | msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH)); | |
23721387 SW |
1362 | } |
1363 | ||
5d52dad2 SE |
1364 | /* The hash for claim and backbone hash receive the same key because they |
1365 | * are getting initialized by hash_new with the same key. Reinitializing | |
1366 | * them with to different keys to allow nested locking without generating | |
1367 | * lockdep warnings | |
1368 | */ | |
3b300de3 SE |
1369 | static struct lock_class_key batadv_claim_hash_lock_class_key; |
1370 | static struct lock_class_key batadv_backbone_hash_lock_class_key; | |
5d52dad2 | 1371 | |
04e14be6 SW |
1372 | /** |
1373 | * batadv_bla_init - initialize all bla structures | |
1374 | * @bat_priv: the bat priv with all the soft interface information | |
1375 | * | |
1376 | * Return: 0 on success, < 0 on error. | |
1377 | */ | |
56303d34 | 1378 | int batadv_bla_init(struct batadv_priv *bat_priv) |
23721387 | 1379 | { |
fe2da6ff | 1380 | int i; |
6b5e971a | 1381 | u8 claim_dest[ETH_ALEN] = {0xff, 0x43, 0x05, 0x00, 0x00, 0x00}; |
56303d34 | 1382 | struct batadv_hard_iface *primary_if; |
6b5e971a | 1383 | u16 crc; |
807736f6 | 1384 | unsigned long entrytime; |
fe2da6ff | 1385 | |
7dac7b76 LL |
1386 | spin_lock_init(&bat_priv->bla.bcast_duplist_lock); |
1387 | ||
39c75a51 | 1388 | batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hash registering\n"); |
23721387 | 1389 | |
38ef3d1d | 1390 | /* setting claim destination address */ |
807736f6 SE |
1391 | memcpy(&bat_priv->bla.claim_dest.magic, claim_dest, 3); |
1392 | bat_priv->bla.claim_dest.type = 0; | |
e5d89254 | 1393 | primary_if = batadv_primary_if_get_selected(bat_priv); |
38ef3d1d | 1394 | if (primary_if) { |
807736f6 SE |
1395 | crc = crc16(0, primary_if->net_dev->dev_addr, ETH_ALEN); |
1396 | bat_priv->bla.claim_dest.group = htons(crc); | |
82047ad7 | 1397 | batadv_hardif_put(primary_if); |
38ef3d1d | 1398 | } else { |
807736f6 | 1399 | bat_priv->bla.claim_dest.group = 0; /* will be set later */ |
38ef3d1d SW |
1400 | } |
1401 | ||
fe2da6ff | 1402 | /* initialize the duplicate list */ |
807736f6 | 1403 | entrytime = jiffies - msecs_to_jiffies(BATADV_DUPLIST_TIMEOUT); |
42d0b044 | 1404 | for (i = 0; i < BATADV_DUPLIST_SIZE; i++) |
807736f6 SE |
1405 | bat_priv->bla.bcast_duplist[i].entrytime = entrytime; |
1406 | bat_priv->bla.bcast_duplist_curr = 0; | |
fe2da6ff | 1407 | |
807736f6 | 1408 | if (bat_priv->bla.claim_hash) |
5346c35e | 1409 | return 0; |
23721387 | 1410 | |
807736f6 SE |
1411 | bat_priv->bla.claim_hash = batadv_hash_new(128); |
1412 | bat_priv->bla.backbone_hash = batadv_hash_new(32); | |
23721387 | 1413 | |
807736f6 | 1414 | if (!bat_priv->bla.claim_hash || !bat_priv->bla.backbone_hash) |
5346c35e | 1415 | return -ENOMEM; |
23721387 | 1416 | |
807736f6 | 1417 | batadv_hash_set_lock_class(bat_priv->bla.claim_hash, |
3b300de3 | 1418 | &batadv_claim_hash_lock_class_key); |
807736f6 | 1419 | batadv_hash_set_lock_class(bat_priv->bla.backbone_hash, |
3b300de3 | 1420 | &batadv_backbone_hash_lock_class_key); |
5d52dad2 | 1421 | |
39c75a51 | 1422 | batadv_dbg(BATADV_DBG_BLA, bat_priv, "bla hashes initialized\n"); |
23721387 | 1423 | |
72414442 AQ |
1424 | INIT_DELAYED_WORK(&bat_priv->bla.work, batadv_bla_periodic_work); |
1425 | ||
1426 | queue_delayed_work(batadv_event_workqueue, &bat_priv->bla.work, | |
1427 | msecs_to_jiffies(BATADV_BLA_PERIOD_LENGTH)); | |
5346c35e | 1428 | return 0; |
23721387 SW |
1429 | } |
1430 | ||
2c53040f | 1431 | /** |
04e14be6 | 1432 | * batadv_bla_check_bcast_duplist - Check if a frame is in the broadcast dup. |
2c53040f | 1433 | * @bat_priv: the bat priv with all the soft interface information |
004e86fc | 1434 | * @skb: contains the bcast_packet to be checked |
fe2da6ff SW |
1435 | * |
1436 | * check if it is on our broadcast list. Another gateway might | |
1437 | * have sent the same packet because it is connected to the same backbone, | |
1438 | * so we have to remove this duplicate. | |
1439 | * | |
1440 | * This is performed by checking the CRC, which will tell us | |
1441 | * with a good chance that it is the same packet. If it is furthermore | |
1442 | * sent by another host, drop it. We allow equal packets from | |
1443 | * the same host however as this might be intended. | |
04e14be6 SW |
1444 | * |
1445 | * Return: 1 if a packet is in the duplicate list, 0 otherwise. | |
9cfc7bd6 | 1446 | */ |
56303d34 | 1447 | int batadv_bla_check_bcast_duplist(struct batadv_priv *bat_priv, |
004e86fc | 1448 | struct sk_buff *skb) |
fe2da6ff | 1449 | { |
004e86fc SW |
1450 | int i, curr, ret = 0; |
1451 | __be32 crc; | |
1452 | struct batadv_bcast_packet *bcast_packet; | |
56303d34 | 1453 | struct batadv_bcast_duplist_entry *entry; |
fe2da6ff | 1454 | |
004e86fc | 1455 | bcast_packet = (struct batadv_bcast_packet *)skb->data; |
fe2da6ff SW |
1456 | |
1457 | /* calculate the crc ... */ | |
004e86fc | 1458 | crc = batadv_skb_crc32(skb, (u8 *)(bcast_packet + 1)); |
fe2da6ff | 1459 | |
7dac7b76 LL |
1460 | spin_lock_bh(&bat_priv->bla.bcast_duplist_lock); |
1461 | ||
42d0b044 | 1462 | for (i = 0; i < BATADV_DUPLIST_SIZE; i++) { |
807736f6 SE |
1463 | curr = (bat_priv->bla.bcast_duplist_curr + i); |
1464 | curr %= BATADV_DUPLIST_SIZE; | |
1465 | entry = &bat_priv->bla.bcast_duplist[curr]; | |
fe2da6ff SW |
1466 | |
1467 | /* we can stop searching if the entry is too old ; | |
1468 | * later entries will be even older | |
1469 | */ | |
42d0b044 SE |
1470 | if (batadv_has_timed_out(entry->entrytime, |
1471 | BATADV_DUPLIST_TIMEOUT)) | |
fe2da6ff SW |
1472 | break; |
1473 | ||
1474 | if (entry->crc != crc) | |
1475 | continue; | |
1476 | ||
1eda58bf | 1477 | if (batadv_compare_eth(entry->orig, bcast_packet->orig)) |
fe2da6ff SW |
1478 | continue; |
1479 | ||
1480 | /* this entry seems to match: same crc, not too old, | |
1481 | * and from another gw. therefore return 1 to forbid it. | |
1482 | */ | |
7dac7b76 LL |
1483 | ret = 1; |
1484 | goto out; | |
fe2da6ff | 1485 | } |
7dac7b76 | 1486 | /* not found, add a new entry (overwrite the oldest entry) |
3f68785e | 1487 | * and allow it, its the first occurrence. |
7dac7b76 | 1488 | */ |
807736f6 | 1489 | curr = (bat_priv->bla.bcast_duplist_curr + BATADV_DUPLIST_SIZE - 1); |
42d0b044 | 1490 | curr %= BATADV_DUPLIST_SIZE; |
807736f6 | 1491 | entry = &bat_priv->bla.bcast_duplist[curr]; |
fe2da6ff SW |
1492 | entry->crc = crc; |
1493 | entry->entrytime = jiffies; | |
8fdd0153 | 1494 | ether_addr_copy(entry->orig, bcast_packet->orig); |
807736f6 | 1495 | bat_priv->bla.bcast_duplist_curr = curr; |
fe2da6ff | 1496 | |
7dac7b76 LL |
1497 | out: |
1498 | spin_unlock_bh(&bat_priv->bla.bcast_duplist_lock); | |
1499 | ||
1500 | return ret; | |
fe2da6ff SW |
1501 | } |
1502 | ||
1b371d13 | 1503 | /** |
04e14be6 SW |
1504 | * batadv_bla_is_backbone_gw_orig - Check if the originator is a gateway for |
1505 | * the VLAN identified by vid. | |
1b371d13 | 1506 | * @bat_priv: the bat priv with all the soft interface information |
20ff9d59 | 1507 | * @orig: originator mac address |
cfd4f757 | 1508 | * @vid: VLAN identifier |
20ff9d59 | 1509 | * |
62fe710f | 1510 | * Return: true if orig is a backbone for this vid, false otherwise. |
20ff9d59 | 1511 | */ |
6b5e971a | 1512 | bool batadv_bla_is_backbone_gw_orig(struct batadv_priv *bat_priv, u8 *orig, |
cfd4f757 | 1513 | unsigned short vid) |
20ff9d59 | 1514 | { |
807736f6 | 1515 | struct batadv_hashtable *hash = bat_priv->bla.backbone_hash; |
20ff9d59 | 1516 | struct hlist_head *head; |
bae98774 | 1517 | struct batadv_bla_backbone_gw *backbone_gw; |
20ff9d59 SW |
1518 | int i; |
1519 | ||
1520 | if (!atomic_read(&bat_priv->bridge_loop_avoidance)) | |
cfd4f757 | 1521 | return false; |
20ff9d59 SW |
1522 | |
1523 | if (!hash) | |
cfd4f757 | 1524 | return false; |
20ff9d59 SW |
1525 | |
1526 | for (i = 0; i < hash->size; i++) { | |
1527 | head = &hash->table[i]; | |
1528 | ||
1529 | rcu_read_lock(); | |
b67bfe0d | 1530 | hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) { |
cfd4f757 AQ |
1531 | if (batadv_compare_eth(backbone_gw->orig, orig) && |
1532 | backbone_gw->vid == vid) { | |
20ff9d59 | 1533 | rcu_read_unlock(); |
cfd4f757 | 1534 | return true; |
20ff9d59 SW |
1535 | } |
1536 | } | |
1537 | rcu_read_unlock(); | |
1538 | } | |
1539 | ||
cfd4f757 | 1540 | return false; |
20ff9d59 SW |
1541 | } |
1542 | ||
2c53040f | 1543 | /** |
04e14be6 | 1544 | * batadv_bla_is_backbone_gw - check if originator is a backbone gw for a VLAN. |
2c53040f | 1545 | * @skb: the frame to be checked |
23721387 SW |
1546 | * @orig_node: the orig_node of the frame |
1547 | * @hdr_size: maximum length of the frame | |
1548 | * | |
62fe710f SE |
1549 | * Return: 1 if the orig_node is also a gateway on the soft interface, otherwise |
1550 | * it returns 0. | |
23721387 | 1551 | */ |
08adf151 | 1552 | int batadv_bla_is_backbone_gw(struct sk_buff *skb, |
56303d34 | 1553 | struct batadv_orig_node *orig_node, int hdr_size) |
23721387 | 1554 | { |
bae98774 | 1555 | struct batadv_bla_backbone_gw *backbone_gw; |
c018ad3d | 1556 | unsigned short vid; |
23721387 SW |
1557 | |
1558 | if (!atomic_read(&orig_node->bat_priv->bridge_loop_avoidance)) | |
1559 | return 0; | |
1560 | ||
1561 | /* first, find out the vid. */ | |
0d125074 | 1562 | if (!pskb_may_pull(skb, hdr_size + ETH_HLEN)) |
23721387 SW |
1563 | return 0; |
1564 | ||
c018ad3d | 1565 | vid = batadv_get_vid(skb, hdr_size); |
23721387 SW |
1566 | |
1567 | /* see if this originator is a backbone gw for this VLAN */ | |
3b300de3 SE |
1568 | backbone_gw = batadv_backbone_hash_find(orig_node->bat_priv, |
1569 | orig_node->orig, vid); | |
23721387 SW |
1570 | if (!backbone_gw) |
1571 | return 0; | |
1572 | ||
c8b86c12 | 1573 | batadv_backbone_gw_put(backbone_gw); |
23721387 SW |
1574 | return 1; |
1575 | } | |
1576 | ||
04e14be6 | 1577 | /** |
6d030de8 | 1578 | * batadv_bla_free - free all bla structures |
04e14be6 SW |
1579 | * @bat_priv: the bat priv with all the soft interface information |
1580 | * | |
1581 | * for softinterface free or module unload | |
1582 | */ | |
56303d34 | 1583 | void batadv_bla_free(struct batadv_priv *bat_priv) |
23721387 | 1584 | { |
56303d34 | 1585 | struct batadv_hard_iface *primary_if; |
23721387 | 1586 | |
807736f6 | 1587 | cancel_delayed_work_sync(&bat_priv->bla.work); |
e5d89254 | 1588 | primary_if = batadv_primary_if_get_selected(bat_priv); |
23721387 | 1589 | |
807736f6 | 1590 | if (bat_priv->bla.claim_hash) { |
3b300de3 | 1591 | batadv_bla_purge_claims(bat_priv, primary_if, 1); |
807736f6 SE |
1592 | batadv_hash_destroy(bat_priv->bla.claim_hash); |
1593 | bat_priv->bla.claim_hash = NULL; | |
23721387 | 1594 | } |
807736f6 | 1595 | if (bat_priv->bla.backbone_hash) { |
3b300de3 | 1596 | batadv_bla_purge_backbone_gw(bat_priv, 1); |
807736f6 SE |
1597 | batadv_hash_destroy(bat_priv->bla.backbone_hash); |
1598 | bat_priv->bla.backbone_hash = NULL; | |
23721387 SW |
1599 | } |
1600 | if (primary_if) | |
82047ad7 | 1601 | batadv_hardif_put(primary_if); |
23721387 SW |
1602 | } |
1603 | ||
2c53040f | 1604 | /** |
04e14be6 | 1605 | * batadv_bla_rx - check packets coming from the mesh. |
2c53040f | 1606 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
1607 | * @skb: the frame to be checked |
1608 | * @vid: the VLAN ID of the frame | |
2d3f6ccc | 1609 | * @is_bcast: the packet came in a broadcast packet type. |
23721387 | 1610 | * |
04e14be6 | 1611 | * batadv_bla_rx avoidance checks if: |
23721387 SW |
1612 | * * we have to race for a claim |
1613 | * * if the frame is allowed on the LAN | |
1614 | * | |
62fe710f SE |
1615 | * in these cases, the skb is further handled by this function |
1616 | * | |
1617 | * Return: 1 if handled, otherwise it returns 0 and the caller shall further | |
23721387 | 1618 | * process the skb. |
23721387 | 1619 | */ |
eb2deb6b AQ |
1620 | int batadv_bla_rx(struct batadv_priv *bat_priv, struct sk_buff *skb, |
1621 | unsigned short vid, bool is_bcast) | |
23721387 SW |
1622 | { |
1623 | struct ethhdr *ethhdr; | |
712bbfe4 | 1624 | struct batadv_bla_claim search_claim, *claim = NULL; |
56303d34 | 1625 | struct batadv_hard_iface *primary_if; |
23721387 SW |
1626 | int ret; |
1627 | ||
7ed4be95 | 1628 | ethhdr = eth_hdr(skb); |
23721387 | 1629 | |
e5d89254 | 1630 | primary_if = batadv_primary_if_get_selected(bat_priv); |
23721387 SW |
1631 | if (!primary_if) |
1632 | goto handled; | |
1633 | ||
1634 | if (!atomic_read(&bat_priv->bridge_loop_avoidance)) | |
1635 | goto allow; | |
1636 | ||
807736f6 | 1637 | if (unlikely(atomic_read(&bat_priv->bla.num_requests))) |
23721387 | 1638 | /* don't allow broadcasts while requests are in flight */ |
2d3f6ccc | 1639 | if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) |
23721387 SW |
1640 | goto handled; |
1641 | ||
8fdd0153 | 1642 | ether_addr_copy(search_claim.addr, ethhdr->h_source); |
23721387 | 1643 | search_claim.vid = vid; |
3b300de3 | 1644 | claim = batadv_claim_hash_find(bat_priv, &search_claim); |
23721387 SW |
1645 | |
1646 | if (!claim) { | |
1647 | /* possible optimization: race for a claim */ | |
1648 | /* No claim exists yet, claim it for us! | |
1649 | */ | |
3b300de3 SE |
1650 | batadv_handle_claim(bat_priv, primary_if, |
1651 | primary_if->net_dev->dev_addr, | |
1652 | ethhdr->h_source, vid); | |
23721387 SW |
1653 | goto allow; |
1654 | } | |
1655 | ||
1656 | /* if it is our own claim ... */ | |
1eda58bf SE |
1657 | if (batadv_compare_eth(claim->backbone_gw->orig, |
1658 | primary_if->net_dev->dev_addr)) { | |
23721387 SW |
1659 | /* ... allow it in any case */ |
1660 | claim->lasttime = jiffies; | |
1661 | goto allow; | |
1662 | } | |
1663 | ||
1664 | /* if it is a broadcast ... */ | |
2d3f6ccc SW |
1665 | if (is_multicast_ether_addr(ethhdr->h_dest) && is_bcast) { |
1666 | /* ... drop it. the responsible gateway is in charge. | |
1667 | * | |
1668 | * We need to check is_bcast because with the gateway | |
1669 | * feature, broadcasts (like DHCP requests) may be sent | |
1670 | * using a unicast packet type. | |
1671 | */ | |
23721387 SW |
1672 | goto handled; |
1673 | } else { | |
1674 | /* seems the client considers us as its best gateway. | |
1675 | * send a claim and update the claim table | |
1676 | * immediately. | |
1677 | */ | |
3b300de3 SE |
1678 | batadv_handle_claim(bat_priv, primary_if, |
1679 | primary_if->net_dev->dev_addr, | |
1680 | ethhdr->h_source, vid); | |
23721387 SW |
1681 | goto allow; |
1682 | } | |
1683 | allow: | |
3b300de3 | 1684 | batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid); |
23721387 SW |
1685 | ret = 0; |
1686 | goto out; | |
1687 | ||
1688 | handled: | |
1689 | kfree_skb(skb); | |
1690 | ret = 1; | |
1691 | ||
1692 | out: | |
1693 | if (primary_if) | |
82047ad7 | 1694 | batadv_hardif_put(primary_if); |
23721387 | 1695 | if (claim) |
321e3e08 | 1696 | batadv_claim_put(claim); |
23721387 SW |
1697 | return ret; |
1698 | } | |
1699 | ||
2c53040f | 1700 | /** |
04e14be6 | 1701 | * batadv_bla_tx - check packets going into the mesh |
2c53040f | 1702 | * @bat_priv: the bat priv with all the soft interface information |
23721387 SW |
1703 | * @skb: the frame to be checked |
1704 | * @vid: the VLAN ID of the frame | |
1705 | * | |
04e14be6 | 1706 | * batadv_bla_tx checks if: |
23721387 SW |
1707 | * * a claim was received which has to be processed |
1708 | * * the frame is allowed on the mesh | |
1709 | * | |
62fe710f | 1710 | * in these cases, the skb is further handled by this function. |
9d2c9488 LL |
1711 | * |
1712 | * This call might reallocate skb data. | |
62fe710f SE |
1713 | * |
1714 | * Return: 1 if handled, otherwise it returns 0 and the caller shall further | |
1715 | * process the skb. | |
23721387 | 1716 | */ |
eb2deb6b AQ |
1717 | int batadv_bla_tx(struct batadv_priv *bat_priv, struct sk_buff *skb, |
1718 | unsigned short vid) | |
23721387 SW |
1719 | { |
1720 | struct ethhdr *ethhdr; | |
712bbfe4 | 1721 | struct batadv_bla_claim search_claim, *claim = NULL; |
56303d34 | 1722 | struct batadv_hard_iface *primary_if; |
23721387 SW |
1723 | int ret = 0; |
1724 | ||
e5d89254 | 1725 | primary_if = batadv_primary_if_get_selected(bat_priv); |
23721387 SW |
1726 | if (!primary_if) |
1727 | goto out; | |
1728 | ||
1729 | if (!atomic_read(&bat_priv->bridge_loop_avoidance)) | |
1730 | goto allow; | |
1731 | ||
3b300de3 | 1732 | if (batadv_bla_process_claim(bat_priv, primary_if, skb)) |
23721387 SW |
1733 | goto handled; |
1734 | ||
7ed4be95 | 1735 | ethhdr = eth_hdr(skb); |
23721387 | 1736 | |
807736f6 | 1737 | if (unlikely(atomic_read(&bat_priv->bla.num_requests))) |
23721387 SW |
1738 | /* don't allow broadcasts while requests are in flight */ |
1739 | if (is_multicast_ether_addr(ethhdr->h_dest)) | |
1740 | goto handled; | |
1741 | ||
8fdd0153 | 1742 | ether_addr_copy(search_claim.addr, ethhdr->h_source); |
23721387 SW |
1743 | search_claim.vid = vid; |
1744 | ||
3b300de3 | 1745 | claim = batadv_claim_hash_find(bat_priv, &search_claim); |
23721387 SW |
1746 | |
1747 | /* if no claim exists, allow it. */ | |
1748 | if (!claim) | |
1749 | goto allow; | |
1750 | ||
1751 | /* check if we are responsible. */ | |
1eda58bf SE |
1752 | if (batadv_compare_eth(claim->backbone_gw->orig, |
1753 | primary_if->net_dev->dev_addr)) { | |
23721387 SW |
1754 | /* if yes, the client has roamed and we have |
1755 | * to unclaim it. | |
1756 | */ | |
3b300de3 SE |
1757 | batadv_handle_unclaim(bat_priv, primary_if, |
1758 | primary_if->net_dev->dev_addr, | |
1759 | ethhdr->h_source, vid); | |
23721387 SW |
1760 | goto allow; |
1761 | } | |
1762 | ||
1763 | /* check if it is a multicast/broadcast frame */ | |
1764 | if (is_multicast_ether_addr(ethhdr->h_dest)) { | |
1765 | /* drop it. the responsible gateway has forwarded it into | |
1766 | * the backbone network. | |
1767 | */ | |
1768 | goto handled; | |
1769 | } else { | |
1770 | /* we must allow it. at least if we are | |
1771 | * responsible for the DESTINATION. | |
1772 | */ | |
1773 | goto allow; | |
1774 | } | |
1775 | allow: | |
3b300de3 | 1776 | batadv_bla_update_own_backbone_gw(bat_priv, primary_if, vid); |
23721387 SW |
1777 | ret = 0; |
1778 | goto out; | |
1779 | handled: | |
1780 | ret = 1; | |
1781 | out: | |
1782 | if (primary_if) | |
82047ad7 | 1783 | batadv_hardif_put(primary_if); |
23721387 | 1784 | if (claim) |
321e3e08 | 1785 | batadv_claim_put(claim); |
23721387 SW |
1786 | return ret; |
1787 | } | |
9bf8e4d4 | 1788 | |
04e14be6 SW |
1789 | /** |
1790 | * batadv_bla_claim_table_seq_print_text - print the claim table in a seq file | |
1791 | * @seq: seq file to print on | |
1792 | * @offset: not used | |
1793 | * | |
1794 | * Return: always 0 | |
1795 | */ | |
08adf151 | 1796 | int batadv_bla_claim_table_seq_print_text(struct seq_file *seq, void *offset) |
9bf8e4d4 SW |
1797 | { |
1798 | struct net_device *net_dev = (struct net_device *)seq->private; | |
56303d34 | 1799 | struct batadv_priv *bat_priv = netdev_priv(net_dev); |
807736f6 | 1800 | struct batadv_hashtable *hash = bat_priv->bla.claim_hash; |
712bbfe4 | 1801 | struct batadv_bla_claim *claim; |
56303d34 | 1802 | struct batadv_hard_iface *primary_if; |
9bf8e4d4 | 1803 | struct hlist_head *head; |
5a1dd8a4 | 1804 | u16 backbone_crc; |
6b5e971a | 1805 | u32 i; |
9bf8e4d4 | 1806 | bool is_own; |
6b5e971a | 1807 | u8 *primary_addr; |
9bf8e4d4 | 1808 | |
30da63a6 ML |
1809 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1810 | if (!primary_if) | |
9bf8e4d4 | 1811 | goto out; |
9bf8e4d4 | 1812 | |
1eda58bf | 1813 | primary_addr = primary_if->net_dev->dev_addr; |
38ef3d1d | 1814 | seq_printf(seq, |
39a32991 | 1815 | "Claims announced for the mesh %s (orig %pM, group id %#.4x)\n", |
1eda58bf | 1816 | net_dev->name, primary_addr, |
807736f6 | 1817 | ntohs(bat_priv->bla.claim_dest.group)); |
925a6f37 AQ |
1818 | seq_puts(seq, |
1819 | " Client VID Originator [o] (CRC )\n"); | |
9bf8e4d4 SW |
1820 | for (i = 0; i < hash->size; i++) { |
1821 | head = &hash->table[i]; | |
1822 | ||
1823 | rcu_read_lock(); | |
b67bfe0d | 1824 | hlist_for_each_entry_rcu(claim, head, hash_entry) { |
1eda58bf SE |
1825 | is_own = batadv_compare_eth(claim->backbone_gw->orig, |
1826 | primary_addr); | |
5a1dd8a4 SW |
1827 | |
1828 | spin_lock_bh(&claim->backbone_gw->crc_lock); | |
1829 | backbone_crc = claim->backbone_gw->crc; | |
1830 | spin_unlock_bh(&claim->backbone_gw->crc_lock); | |
eb2deb6b | 1831 | seq_printf(seq, " * %pM on %5d by %pM [%c] (%#.4x)\n", |
5f80df67 | 1832 | claim->addr, BATADV_PRINT_VID(claim->vid), |
9bf8e4d4 SW |
1833 | claim->backbone_gw->orig, |
1834 | (is_own ? 'x' : ' '), | |
5a1dd8a4 | 1835 | backbone_crc); |
9bf8e4d4 SW |
1836 | } |
1837 | rcu_read_unlock(); | |
1838 | } | |
1839 | out: | |
1840 | if (primary_if) | |
82047ad7 | 1841 | batadv_hardif_put(primary_if); |
30da63a6 | 1842 | return 0; |
9bf8e4d4 | 1843 | } |
536a23f1 | 1844 | |
04e14be6 SW |
1845 | /** |
1846 | * batadv_bla_backbone_table_seq_print_text - print the backbone table in a seq | |
1847 | * file | |
1848 | * @seq: seq file to print on | |
1849 | * @offset: not used | |
1850 | * | |
1851 | * Return: always 0 | |
1852 | */ | |
536a23f1 SW |
1853 | int batadv_bla_backbone_table_seq_print_text(struct seq_file *seq, void *offset) |
1854 | { | |
1855 | struct net_device *net_dev = (struct net_device *)seq->private; | |
1856 | struct batadv_priv *bat_priv = netdev_priv(net_dev); | |
807736f6 | 1857 | struct batadv_hashtable *hash = bat_priv->bla.backbone_hash; |
bae98774 | 1858 | struct batadv_bla_backbone_gw *backbone_gw; |
536a23f1 | 1859 | struct batadv_hard_iface *primary_if; |
536a23f1 SW |
1860 | struct hlist_head *head; |
1861 | int secs, msecs; | |
5a1dd8a4 | 1862 | u16 backbone_crc; |
6b5e971a | 1863 | u32 i; |
536a23f1 | 1864 | bool is_own; |
6b5e971a | 1865 | u8 *primary_addr; |
536a23f1 | 1866 | |
30da63a6 ML |
1867 | primary_if = batadv_seq_print_text_primary_if_get(seq); |
1868 | if (!primary_if) | |
536a23f1 | 1869 | goto out; |
536a23f1 SW |
1870 | |
1871 | primary_addr = primary_if->net_dev->dev_addr; | |
1872 | seq_printf(seq, | |
39a32991 | 1873 | "Backbones announced for the mesh %s (orig %pM, group id %#.4x)\n", |
536a23f1 | 1874 | net_dev->name, primary_addr, |
807736f6 | 1875 | ntohs(bat_priv->bla.claim_dest.group)); |
925a6f37 | 1876 | seq_puts(seq, " Originator VID last seen (CRC )\n"); |
536a23f1 SW |
1877 | for (i = 0; i < hash->size; i++) { |
1878 | head = &hash->table[i]; | |
1879 | ||
1880 | rcu_read_lock(); | |
b67bfe0d | 1881 | hlist_for_each_entry_rcu(backbone_gw, head, hash_entry) { |
536a23f1 SW |
1882 | msecs = jiffies_to_msecs(jiffies - |
1883 | backbone_gw->lasttime); | |
1884 | secs = msecs / 1000; | |
1885 | msecs = msecs % 1000; | |
1886 | ||
1887 | is_own = batadv_compare_eth(backbone_gw->orig, | |
1888 | primary_addr); | |
1889 | if (is_own) | |
1890 | continue; | |
1891 | ||
5a1dd8a4 SW |
1892 | spin_lock_bh(&backbone_gw->crc_lock); |
1893 | backbone_crc = backbone_gw->crc; | |
1894 | spin_unlock_bh(&backbone_gw->crc_lock); | |
1895 | ||
eb2deb6b | 1896 | seq_printf(seq, " * %pM on %5d %4i.%03is (%#.4x)\n", |
5f80df67 AQ |
1897 | backbone_gw->orig, |
1898 | BATADV_PRINT_VID(backbone_gw->vid), secs, | |
5a1dd8a4 | 1899 | msecs, backbone_crc); |
536a23f1 SW |
1900 | } |
1901 | rcu_read_unlock(); | |
1902 | } | |
1903 | out: | |
1904 | if (primary_if) | |
82047ad7 | 1905 | batadv_hardif_put(primary_if); |
30da63a6 | 1906 | return 0; |
536a23f1 | 1907 | } |