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19#include "netlink.h"
20#include "main.h"
21
22#include <linux/atomic.h>
23#include <linux/byteorder/generic.h>
24#include <linux/cache.h>
25#include <linux/errno.h>
26#include <linux/export.h>
27#include <linux/genetlink.h>
28#include <linux/gfp.h>
29#include <linux/if_ether.h>
30#include <linux/init.h>
31#include <linux/kernel.h>
32#include <linux/netdevice.h>
33#include <linux/netlink.h>
34#include <linux/printk.h>
35#include <linux/rculist.h>
36#include <linux/rcupdate.h>
37#include <linux/skbuff.h>
38#include <linux/stddef.h>
39#include <linux/types.h>
40#include <net/genetlink.h>
41#include <net/netlink.h>
42#include <net/sock.h>
43#include <uapi/linux/batadv_packet.h>
44#include <uapi/linux/batman_adv.h>
45
46#include "bat_algo.h"
47#include "bridge_loop_avoidance.h"
48#include "distributed-arp-table.h"
49#include "gateway_client.h"
50#include "hard-interface.h"
51#include "multicast.h"
52#include "originator.h"
53#include "soft-interface.h"
54#include "tp_meter.h"
55#include "translation-table.h"
56
57struct genl_family batadv_netlink_family;
58
59
60enum batadv_netlink_multicast_groups {
61 BATADV_NL_MCGRP_TPMETER,
62};
63
64static const struct genl_multicast_group batadv_netlink_mcgrps[] = {
65 [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
66};
67
68static const struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
69 [BATADV_ATTR_VERSION] = { .type = NLA_STRING },
70 [BATADV_ATTR_ALGO_NAME] = { .type = NLA_STRING },
71 [BATADV_ATTR_MESH_IFINDEX] = { .type = NLA_U32 },
72 [BATADV_ATTR_MESH_IFNAME] = { .type = NLA_STRING },
73 [BATADV_ATTR_MESH_ADDRESS] = { .len = ETH_ALEN },
74 [BATADV_ATTR_HARD_IFINDEX] = { .type = NLA_U32 },
75 [BATADV_ATTR_HARD_IFNAME] = { .type = NLA_STRING },
76 [BATADV_ATTR_HARD_ADDRESS] = { .len = ETH_ALEN },
77 [BATADV_ATTR_ORIG_ADDRESS] = { .len = ETH_ALEN },
78 [BATADV_ATTR_TPMETER_RESULT] = { .type = NLA_U8 },
79 [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
80 [BATADV_ATTR_TPMETER_BYTES] = { .type = NLA_U64 },
81 [BATADV_ATTR_TPMETER_COOKIE] = { .type = NLA_U32 },
82 [BATADV_ATTR_ACTIVE] = { .type = NLA_FLAG },
83 [BATADV_ATTR_TT_ADDRESS] = { .len = ETH_ALEN },
84 [BATADV_ATTR_TT_TTVN] = { .type = NLA_U8 },
85 [BATADV_ATTR_TT_LAST_TTVN] = { .type = NLA_U8 },
86 [BATADV_ATTR_TT_CRC32] = { .type = NLA_U32 },
87 [BATADV_ATTR_TT_VID] = { .type = NLA_U16 },
88 [BATADV_ATTR_TT_FLAGS] = { .type = NLA_U32 },
89 [BATADV_ATTR_FLAG_BEST] = { .type = NLA_FLAG },
90 [BATADV_ATTR_LAST_SEEN_MSECS] = { .type = NLA_U32 },
91 [BATADV_ATTR_NEIGH_ADDRESS] = { .len = ETH_ALEN },
92 [BATADV_ATTR_TQ] = { .type = NLA_U8 },
93 [BATADV_ATTR_THROUGHPUT] = { .type = NLA_U32 },
94 [BATADV_ATTR_BANDWIDTH_UP] = { .type = NLA_U32 },
95 [BATADV_ATTR_BANDWIDTH_DOWN] = { .type = NLA_U32 },
96 [BATADV_ATTR_ROUTER] = { .len = ETH_ALEN },
97 [BATADV_ATTR_BLA_OWN] = { .type = NLA_FLAG },
98 [BATADV_ATTR_BLA_ADDRESS] = { .len = ETH_ALEN },
99 [BATADV_ATTR_BLA_VID] = { .type = NLA_U16 },
100 [BATADV_ATTR_BLA_BACKBONE] = { .len = ETH_ALEN },
101 [BATADV_ATTR_BLA_CRC] = { .type = NLA_U16 },
102 [BATADV_ATTR_DAT_CACHE_IP4ADDRESS] = { .type = NLA_U32 },
103 [BATADV_ATTR_DAT_CACHE_HWADDRESS] = { .len = ETH_ALEN },
104 [BATADV_ATTR_DAT_CACHE_VID] = { .type = NLA_U16 },
105 [BATADV_ATTR_MCAST_FLAGS] = { .type = NLA_U32 },
106 [BATADV_ATTR_MCAST_FLAGS_PRIV] = { .type = NLA_U32 },
107};
108
109
110
111
112
113
114
115
116int
117batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
118{
119 struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
120
121 return attr ? nla_get_u32(attr) : 0;
122}
123
124
125
126
127
128
129
130
131
132static int
133batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface)
134{
135 struct batadv_priv *bat_priv = netdev_priv(soft_iface);
136 struct batadv_hard_iface *primary_if = NULL;
137 struct net_device *hard_iface;
138 int ret = -ENOBUFS;
139
140 if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
141 nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
142 bat_priv->algo_ops->name) ||
143 nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
144 nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
145 nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
146 soft_iface->dev_addr) ||
147 nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
148 (u8)atomic_read(&bat_priv->tt.vn)))
149 goto out;
150
151#ifdef CONFIG_BATMAN_ADV_BLA
152 if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
153 ntohs(bat_priv->bla.claim_dest.group)))
154 goto out;
155#endif
156
157 if (batadv_mcast_mesh_info_put(msg, bat_priv))
158 goto out;
159
160 primary_if = batadv_primary_if_get_selected(bat_priv);
161 if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
162 hard_iface = primary_if->net_dev;
163
164 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
165 hard_iface->ifindex) ||
166 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
167 hard_iface->name) ||
168 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
169 hard_iface->dev_addr))
170 goto out;
171 }
172
173 ret = 0;
174
175 out:
176 if (primary_if)
177 batadv_hardif_put(primary_if);
178
179 return ret;
180}
181
182
183
184
185
186
187
188
189
190static int
191batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info)
192{
193 struct net *net = genl_info_net(info);
194 struct net_device *soft_iface;
195 struct sk_buff *msg = NULL;
196 void *msg_head;
197 int ifindex;
198 int ret;
199
200 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
201 return -EINVAL;
202
203 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
204 if (!ifindex)
205 return -EINVAL;
206
207 soft_iface = dev_get_by_index(net, ifindex);
208 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
209 ret = -ENODEV;
210 goto out;
211 }
212
213 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
214 if (!msg) {
215 ret = -ENOMEM;
216 goto out;
217 }
218
219 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
220 &batadv_netlink_family, 0,
221 BATADV_CMD_GET_MESH_INFO);
222 if (!msg_head) {
223 ret = -ENOBUFS;
224 goto out;
225 }
226
227 ret = batadv_netlink_mesh_info_put(msg, soft_iface);
228
229 out:
230 if (soft_iface)
231 dev_put(soft_iface);
232
233 if (ret) {
234 if (msg)
235 nlmsg_free(msg);
236 return ret;
237 }
238
239 genlmsg_end(msg, msg_head);
240 return genlmsg_reply(msg, info);
241}
242
243
244
245
246
247
248
249
250static int
251batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
252{
253 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
254 return -ENOBUFS;
255
256 return 0;
257}
258
259
260
261
262
263
264
265
266
267
268
269
270int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
271 u8 result, u32 test_time, u64 total_bytes,
272 u32 cookie)
273{
274 struct sk_buff *msg;
275 void *hdr;
276 int ret;
277
278 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
279 if (!msg)
280 return -ENOMEM;
281
282 hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
283 BATADV_CMD_TP_METER);
284 if (!hdr) {
285 ret = -ENOBUFS;
286 goto err_genlmsg;
287 }
288
289 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
290 goto nla_put_failure;
291
292 if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
293 goto nla_put_failure;
294
295 if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
296 BATADV_ATTR_PAD))
297 goto nla_put_failure;
298
299 if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
300 goto nla_put_failure;
301
302 if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
303 goto nla_put_failure;
304
305 genlmsg_end(msg, hdr);
306
307 genlmsg_multicast_netns(&batadv_netlink_family,
308 dev_net(bat_priv->soft_iface), msg, 0,
309 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
310
311 return 0;
312
313nla_put_failure:
314 genlmsg_cancel(msg, hdr);
315 ret = -EMSGSIZE;
316
317err_genlmsg:
318 nlmsg_free(msg);
319 return ret;
320}
321
322
323
324
325
326
327
328
329static int
330batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
331{
332 struct net *net = genl_info_net(info);
333 struct net_device *soft_iface;
334 struct batadv_priv *bat_priv;
335 struct sk_buff *msg = NULL;
336 u32 test_length;
337 void *msg_head;
338 int ifindex;
339 u32 cookie;
340 u8 *dst;
341 int ret;
342
343 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
344 return -EINVAL;
345
346 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
347 return -EINVAL;
348
349 if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
350 return -EINVAL;
351
352 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
353 if (!ifindex)
354 return -EINVAL;
355
356 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
357
358 test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
359
360 soft_iface = dev_get_by_index(net, ifindex);
361 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
362 ret = -ENODEV;
363 goto out;
364 }
365
366 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
367 if (!msg) {
368 ret = -ENOMEM;
369 goto out;
370 }
371
372 msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
373 &batadv_netlink_family, 0,
374 BATADV_CMD_TP_METER);
375 if (!msg_head) {
376 ret = -ENOBUFS;
377 goto out;
378 }
379
380 bat_priv = netdev_priv(soft_iface);
381 batadv_tp_start(bat_priv, dst, test_length, &cookie);
382
383 ret = batadv_netlink_tp_meter_put(msg, cookie);
384
385 out:
386 if (soft_iface)
387 dev_put(soft_iface);
388
389 if (ret) {
390 if (msg)
391 nlmsg_free(msg);
392 return ret;
393 }
394
395 genlmsg_end(msg, msg_head);
396 return genlmsg_reply(msg, info);
397}
398
399
400
401
402
403
404
405
406static int
407batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
408{
409 struct net *net = genl_info_net(info);
410 struct net_device *soft_iface;
411 struct batadv_priv *bat_priv;
412 int ifindex;
413 u8 *dst;
414 int ret = 0;
415
416 if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
417 return -EINVAL;
418
419 if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
420 return -EINVAL;
421
422 ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
423 if (!ifindex)
424 return -EINVAL;
425
426 dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
427
428 soft_iface = dev_get_by_index(net, ifindex);
429 if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
430 ret = -ENODEV;
431 goto out;
432 }
433
434 bat_priv = netdev_priv(soft_iface);
435 batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
436
437out:
438 if (soft_iface)
439 dev_put(soft_iface);
440
441 return ret;
442}
443
444
445
446
447
448
449
450
451
452
453static int
454batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
455 struct batadv_hard_iface *hard_iface)
456{
457 struct net_device *net_dev = hard_iface->net_dev;
458 void *hdr;
459
460 hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
461 BATADV_CMD_GET_HARDIFS);
462 if (!hdr)
463 return -EMSGSIZE;
464
465 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
466 net_dev->ifindex) ||
467 nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
468 net_dev->name) ||
469 nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
470 net_dev->dev_addr))
471 goto nla_put_failure;
472
473 if (hard_iface->if_status == BATADV_IF_ACTIVE) {
474 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
475 goto nla_put_failure;
476 }
477
478 genlmsg_end(msg, hdr);
479 return 0;
480
481 nla_put_failure:
482 genlmsg_cancel(msg, hdr);
483 return -EMSGSIZE;
484}
485
486
487
488
489
490
491
492
493static int
494batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb)
495{
496 struct net *net = sock_net(cb->skb->sk);
497 struct net_device *soft_iface;
498 struct batadv_hard_iface *hard_iface;
499 int ifindex;
500 int portid = NETLINK_CB(cb->skb).portid;
501 int seq = cb->nlh->nlmsg_seq;
502 int skip = cb->args[0];
503 int i = 0;
504
505 ifindex = batadv_netlink_get_ifindex(cb->nlh,
506 BATADV_ATTR_MESH_IFINDEX);
507 if (!ifindex)
508 return -EINVAL;
509
510 soft_iface = dev_get_by_index(net, ifindex);
511 if (!soft_iface)
512 return -ENODEV;
513
514 if (!batadv_softif_is_valid(soft_iface)) {
515 dev_put(soft_iface);
516 return -ENODEV;
517 }
518
519 rcu_read_lock();
520
521 list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
522 if (hard_iface->soft_iface != soft_iface)
523 continue;
524
525 if (i++ < skip)
526 continue;
527
528 if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
529 hard_iface)) {
530 i--;
531 break;
532 }
533 }
534
535 rcu_read_unlock();
536
537 dev_put(soft_iface);
538
539 cb->args[0] = i;
540
541 return msg->len;
542}
543
544static const struct genl_small_ops batadv_netlink_ops[] = {
545 {
546 .cmd = BATADV_CMD_GET_MESH_INFO,
547 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
548 .flags = GENL_ADMIN_PERM,
549 .doit = batadv_netlink_get_mesh_info,
550 },
551 {
552 .cmd = BATADV_CMD_TP_METER,
553 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
554 .flags = GENL_ADMIN_PERM,
555 .doit = batadv_netlink_tp_meter_start,
556 },
557 {
558 .cmd = BATADV_CMD_TP_METER_CANCEL,
559 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
560 .flags = GENL_ADMIN_PERM,
561 .doit = batadv_netlink_tp_meter_cancel,
562 },
563 {
564 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
565 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
566 .flags = GENL_ADMIN_PERM,
567 .dumpit = batadv_algo_dump,
568 },
569 {
570 .cmd = BATADV_CMD_GET_HARDIFS,
571 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
572 .flags = GENL_ADMIN_PERM,
573 .dumpit = batadv_netlink_dump_hardifs,
574 },
575 {
576 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
577 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
578 .flags = GENL_ADMIN_PERM,
579 .dumpit = batadv_tt_local_dump,
580 },
581 {
582 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
583 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
584 .flags = GENL_ADMIN_PERM,
585 .dumpit = batadv_tt_global_dump,
586 },
587 {
588 .cmd = BATADV_CMD_GET_ORIGINATORS,
589 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
590 .flags = GENL_ADMIN_PERM,
591 .dumpit = batadv_orig_dump,
592 },
593 {
594 .cmd = BATADV_CMD_GET_NEIGHBORS,
595 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
596 .flags = GENL_ADMIN_PERM,
597 .dumpit = batadv_hardif_neigh_dump,
598 },
599 {
600 .cmd = BATADV_CMD_GET_GATEWAYS,
601 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
602 .flags = GENL_ADMIN_PERM,
603 .dumpit = batadv_gw_dump,
604 },
605 {
606 .cmd = BATADV_CMD_GET_BLA_CLAIM,
607 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
608 .flags = GENL_ADMIN_PERM,
609 .dumpit = batadv_bla_claim_dump,
610 },
611 {
612 .cmd = BATADV_CMD_GET_BLA_BACKBONE,
613 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
614 .flags = GENL_ADMIN_PERM,
615 .dumpit = batadv_bla_backbone_dump,
616 },
617 {
618 .cmd = BATADV_CMD_GET_DAT_CACHE,
619 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
620 .flags = GENL_ADMIN_PERM,
621 .dumpit = batadv_dat_cache_dump,
622 },
623 {
624 .cmd = BATADV_CMD_GET_MCAST_FLAGS,
625 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
626 .flags = GENL_ADMIN_PERM,
627 .dumpit = batadv_mcast_flags_dump,
628 },
629
630};
631
632struct genl_family batadv_netlink_family __ro_after_init = {
633 .hdrsize = 0,
634 .name = BATADV_NL_NAME,
635 .version = 1,
636 .maxattr = BATADV_ATTR_MAX,
637 .policy = batadv_netlink_policy,
638 .netnsok = true,
639 .module = THIS_MODULE,
640 .small_ops = batadv_netlink_ops,
641 .n_small_ops = ARRAY_SIZE(batadv_netlink_ops),
642 .mcgrps = batadv_netlink_mcgrps,
643 .n_mcgrps = ARRAY_SIZE(batadv_netlink_mcgrps),
644};
645
646
647
648
649void __init batadv_netlink_register(void)
650{
651 int ret;
652
653 ret = genl_register_family(&batadv_netlink_family);
654 if (ret)
655 pr_warn("unable to register netlink family");
656}
657
658
659
660
661void batadv_netlink_unregister(void)
662{
663 genl_unregister_family(&batadv_netlink_family);
664}
665
