1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 *
4 * Authors:
5 * Alexander Aring <aar@pengutronix.de>
6 *
7 * Based on: net/wireless/nl80211.c
8 */
9
10 #include <linux/rtnetlink.h>
11
12 #include <net/cfg802154.h>
13 #include <net/genetlink.h>
14 #include <net/mac802154.h>
15 #include <net/netlink.h>
16 #include <net/nl802154.h>
17 #include <net/sock.h>
18
19 #include "nl802154.h"
20 #include "rdev-ops.h"
21 #include "core.h"
22
23 /* the netlink family */
24 static struct genl_family nl802154_fam;
25
26 /* multicast groups */
27 enum nl802154_multicast_groups {
28 NL802154_MCGRP_CONFIG,
29 NL802154_MCGRP_SCAN,
30 };
31
32 static const struct genl_multicast_group nl802154_mcgrps[] = {
33 [NL802154_MCGRP_CONFIG] = { .name = "config", },
34 [NL802154_MCGRP_SCAN] = { .name = "scan", },
35 };
36
37 /* returns ERR_PTR values */
38 static struct wpan_dev *
__cfg802154_wpan_dev_from_attrs(struct net * netns,struct nlattr ** attrs)39 __cfg802154_wpan_dev_from_attrs(struct net *netns, struct nlattr **attrs)
40 {
41 struct cfg802154_registered_device *rdev;
42 struct wpan_dev *result = NULL;
43 bool have_ifidx = attrs[NL802154_ATTR_IFINDEX];
44 bool have_wpan_dev_id = attrs[NL802154_ATTR_WPAN_DEV];
45 u64 wpan_dev_id;
46 int wpan_phy_idx = -1;
47 int ifidx = -1;
48
49 ASSERT_RTNL();
50
51 if (!have_ifidx && !have_wpan_dev_id)
52 return ERR_PTR(-EINVAL);
53
54 if (have_ifidx)
55 ifidx = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
56 if (have_wpan_dev_id) {
57 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
58 wpan_phy_idx = wpan_dev_id >> 32;
59 }
60
61 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
62 struct wpan_dev *wpan_dev;
63
64 if (wpan_phy_net(&rdev->wpan_phy) != netns)
65 continue;
66
67 if (have_wpan_dev_id && rdev->wpan_phy_idx != wpan_phy_idx)
68 continue;
69
70 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
71 if (have_ifidx && wpan_dev->netdev &&
72 wpan_dev->netdev->ifindex == ifidx) {
73 result = wpan_dev;
74 break;
75 }
76 if (have_wpan_dev_id &&
77 wpan_dev->identifier == (u32)wpan_dev_id) {
78 result = wpan_dev;
79 break;
80 }
81 }
82
83 if (result)
84 break;
85 }
86
87 if (result)
88 return result;
89
90 return ERR_PTR(-ENODEV);
91 }
92
93 static struct cfg802154_registered_device *
__cfg802154_rdev_from_attrs(struct net * netns,struct nlattr ** attrs)94 __cfg802154_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
95 {
96 struct cfg802154_registered_device *rdev = NULL, *tmp;
97 struct net_device *netdev;
98
99 ASSERT_RTNL();
100
101 if (!attrs[NL802154_ATTR_WPAN_PHY] &&
102 !attrs[NL802154_ATTR_IFINDEX] &&
103 !attrs[NL802154_ATTR_WPAN_DEV])
104 return ERR_PTR(-EINVAL);
105
106 if (attrs[NL802154_ATTR_WPAN_PHY])
107 rdev = cfg802154_rdev_by_wpan_phy_idx(
108 nla_get_u32(attrs[NL802154_ATTR_WPAN_PHY]));
109
110 if (attrs[NL802154_ATTR_WPAN_DEV]) {
111 u64 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
112 struct wpan_dev *wpan_dev;
113 bool found = false;
114
115 tmp = cfg802154_rdev_by_wpan_phy_idx(wpan_dev_id >> 32);
116 if (tmp) {
117 /* make sure wpan_dev exists */
118 list_for_each_entry(wpan_dev, &tmp->wpan_dev_list, list) {
119 if (wpan_dev->identifier != (u32)wpan_dev_id)
120 continue;
121 found = true;
122 break;
123 }
124
125 if (!found)
126 tmp = NULL;
127
128 if (rdev && tmp != rdev)
129 return ERR_PTR(-EINVAL);
130 rdev = tmp;
131 }
132 }
133
134 if (attrs[NL802154_ATTR_IFINDEX]) {
135 int ifindex = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
136
137 netdev = __dev_get_by_index(netns, ifindex);
138 if (netdev) {
139 if (netdev->ieee802154_ptr)
140 tmp = wpan_phy_to_rdev(
141 netdev->ieee802154_ptr->wpan_phy);
142 else
143 tmp = NULL;
144
145 /* not wireless device -- return error */
146 if (!tmp)
147 return ERR_PTR(-EINVAL);
148
149 /* mismatch -- return error */
150 if (rdev && tmp != rdev)
151 return ERR_PTR(-EINVAL);
152
153 rdev = tmp;
154 }
155 }
156
157 if (!rdev)
158 return ERR_PTR(-ENODEV);
159
160 if (netns != wpan_phy_net(&rdev->wpan_phy))
161 return ERR_PTR(-ENODEV);
162
163 return rdev;
164 }
165
166 /* This function returns a pointer to the driver
167 * that the genl_info item that is passed refers to.
168 *
169 * The result of this can be a PTR_ERR and hence must
170 * be checked with IS_ERR() for errors.
171 */
172 static struct cfg802154_registered_device *
cfg802154_get_dev_from_info(struct net * netns,struct genl_info * info)173 cfg802154_get_dev_from_info(struct net *netns, struct genl_info *info)
174 {
175 return __cfg802154_rdev_from_attrs(netns, info->attrs);
176 }
177
178 /* policy for the attributes */
179 static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
180 [NL802154_ATTR_WPAN_PHY] = { .type = NLA_U32 },
181 [NL802154_ATTR_WPAN_PHY_NAME] = { .type = NLA_NUL_STRING,
182 .len = 20-1 },
183
184 [NL802154_ATTR_IFINDEX] = { .type = NLA_U32 },
185 [NL802154_ATTR_IFTYPE] = { .type = NLA_U32 },
186 [NL802154_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
187
188 [NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 },
189
190 [NL802154_ATTR_PAGE] = NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_PAGE),
191 [NL802154_ATTR_CHANNEL] = NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_CHANNEL),
192
193 [NL802154_ATTR_TX_POWER] = { .type = NLA_S32, },
194
195 [NL802154_ATTR_CCA_MODE] = { .type = NLA_U32, },
196 [NL802154_ATTR_CCA_OPT] = { .type = NLA_U32, },
197 [NL802154_ATTR_CCA_ED_LEVEL] = { .type = NLA_S32, },
198
199 [NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, },
200
201 [NL802154_ATTR_PAN_ID] = { .type = NLA_U16, },
202 [NL802154_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
203 [NL802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, },
204
205 [NL802154_ATTR_MIN_BE] = { .type = NLA_U8, },
206 [NL802154_ATTR_MAX_BE] = { .type = NLA_U8, },
207 [NL802154_ATTR_MAX_CSMA_BACKOFFS] = { .type = NLA_U8, },
208
209 [NL802154_ATTR_MAX_FRAME_RETRIES] = { .type = NLA_S8, },
210
211 [NL802154_ATTR_LBT_MODE] = { .type = NLA_U8, },
212
213 [NL802154_ATTR_WPAN_PHY_CAPS] = { .type = NLA_NESTED },
214
215 [NL802154_ATTR_SUPPORTED_COMMANDS] = { .type = NLA_NESTED },
216
217 [NL802154_ATTR_ACKREQ_DEFAULT] = { .type = NLA_U8 },
218
219 [NL802154_ATTR_PID] = { .type = NLA_U32 },
220 [NL802154_ATTR_NETNS_FD] = { .type = NLA_U32 },
221
222 [NL802154_ATTR_COORDINATOR] = { .type = NLA_NESTED },
223
224 [NL802154_ATTR_SCAN_TYPE] =
225 NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_ED, NL802154_SCAN_RIT_PASSIVE),
226 [NL802154_ATTR_SCAN_CHANNELS] =
227 NLA_POLICY_MASK(NLA_U32, GENMASK(IEEE802154_MAX_CHANNEL, 0)),
228 [NL802154_ATTR_SCAN_PREAMBLE_CODES] = { .type = NLA_REJECT },
229 [NL802154_ATTR_SCAN_MEAN_PRF] = { .type = NLA_REJECT },
230 [NL802154_ATTR_SCAN_DURATION] =
231 NLA_POLICY_MAX(NLA_U8, IEEE802154_MAX_SCAN_DURATION),
232 [NL802154_ATTR_SCAN_DONE_REASON] =
233 NLA_POLICY_RANGE(NLA_U8, NL802154_SCAN_DONE_REASON_FINISHED,
234 NL802154_SCAN_DONE_REASON_ABORTED),
235 [NL802154_ATTR_BEACON_INTERVAL] =
236 NLA_POLICY_MAX(NLA_U8, IEEE802154_ACTIVE_SCAN_DURATION),
237 [NL802154_ATTR_MAX_ASSOCIATIONS] = { .type = NLA_U32 },
238 [NL802154_ATTR_PEER] = { .type = NLA_NESTED },
239
240 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
241 [NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
242 [NL802154_ATTR_SEC_OUT_LEVEL] = { .type = NLA_U32, },
243 [NL802154_ATTR_SEC_OUT_KEY_ID] = { .type = NLA_NESTED, },
244 [NL802154_ATTR_SEC_FRAME_COUNTER] = { .type = NLA_U32 },
245
246 [NL802154_ATTR_SEC_LEVEL] = { .type = NLA_NESTED },
247 [NL802154_ATTR_SEC_DEVICE] = { .type = NLA_NESTED },
248 [NL802154_ATTR_SEC_DEVKEY] = { .type = NLA_NESTED },
249 [NL802154_ATTR_SEC_KEY] = { .type = NLA_NESTED },
250 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
251 };
252
253 static int
nl802154_prepare_wpan_dev_dump(struct sk_buff * skb,struct netlink_callback * cb,struct cfg802154_registered_device ** rdev,struct wpan_dev ** wpan_dev)254 nl802154_prepare_wpan_dev_dump(struct sk_buff *skb,
255 struct netlink_callback *cb,
256 struct cfg802154_registered_device **rdev,
257 struct wpan_dev **wpan_dev)
258 {
259 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
260 int err;
261
262 rtnl_lock();
263
264 if (!cb->args[0]) {
265 *wpan_dev = __cfg802154_wpan_dev_from_attrs(sock_net(skb->sk),
266 info->info.attrs);
267 if (IS_ERR(*wpan_dev)) {
268 err = PTR_ERR(*wpan_dev);
269 goto out_unlock;
270 }
271 *rdev = wpan_phy_to_rdev((*wpan_dev)->wpan_phy);
272 /* 0 is the first index - add 1 to parse only once */
273 cb->args[0] = (*rdev)->wpan_phy_idx + 1;
274 cb->args[1] = (*wpan_dev)->identifier;
275 } else {
276 /* subtract the 1 again here */
277 struct wpan_phy *wpan_phy = wpan_phy_idx_to_wpan_phy(cb->args[0] - 1);
278 struct wpan_dev *tmp;
279
280 if (!wpan_phy) {
281 err = -ENODEV;
282 goto out_unlock;
283 }
284 *rdev = wpan_phy_to_rdev(wpan_phy);
285 *wpan_dev = NULL;
286
287 list_for_each_entry(tmp, &(*rdev)->wpan_dev_list, list) {
288 if (tmp->identifier == cb->args[1]) {
289 *wpan_dev = tmp;
290 break;
291 }
292 }
293
294 if (!*wpan_dev) {
295 err = -ENODEV;
296 goto out_unlock;
297 }
298 }
299
300 return 0;
301 out_unlock:
302 rtnl_unlock();
303 return err;
304 }
305
306 static void
nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device * rdev)307 nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device *rdev)
308 {
309 rtnl_unlock();
310 }
311
312 /* message building helper */
nl802154hdr_put(struct sk_buff * skb,u32 portid,u32 seq,int flags,u8 cmd)313 static inline void *nl802154hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
314 int flags, u8 cmd)
315 {
316 /* since there is no private header just add the generic one */
317 return genlmsg_put(skb, portid, seq, &nl802154_fam, flags, cmd);
318 }
319
320 static int
nl802154_put_flags(struct sk_buff * msg,int attr,u32 mask)321 nl802154_put_flags(struct sk_buff *msg, int attr, u32 mask)
322 {
323 struct nlattr *nl_flags = nla_nest_start_noflag(msg, attr);
324 int i;
325
326 if (!nl_flags)
327 return -ENOBUFS;
328
329 i = 0;
330 while (mask) {
331 if ((mask & 1) && nla_put_flag(msg, i))
332 return -ENOBUFS;
333
334 mask >>= 1;
335 i++;
336 }
337
338 nla_nest_end(msg, nl_flags);
339 return 0;
340 }
341
342 static int
nl802154_send_wpan_phy_channels(struct cfg802154_registered_device * rdev,struct sk_buff * msg)343 nl802154_send_wpan_phy_channels(struct cfg802154_registered_device *rdev,
344 struct sk_buff *msg)
345 {
346 struct nlattr *nl_page;
347 unsigned long page;
348
349 nl_page = nla_nest_start_noflag(msg, NL802154_ATTR_CHANNELS_SUPPORTED);
350 if (!nl_page)
351 return -ENOBUFS;
352
353 for (page = 0; page <= IEEE802154_MAX_PAGE; page++) {
354 if (nla_put_u32(msg, NL802154_ATTR_SUPPORTED_CHANNEL,
355 rdev->wpan_phy.supported.channels[page]))
356 return -ENOBUFS;
357 }
358 nla_nest_end(msg, nl_page);
359
360 return 0;
361 }
362
363 static int
nl802154_put_capabilities(struct sk_buff * msg,struct cfg802154_registered_device * rdev)364 nl802154_put_capabilities(struct sk_buff *msg,
365 struct cfg802154_registered_device *rdev)
366 {
367 const struct wpan_phy_supported *caps = &rdev->wpan_phy.supported;
368 struct nlattr *nl_caps, *nl_channels;
369 int i;
370
371 nl_caps = nla_nest_start_noflag(msg, NL802154_ATTR_WPAN_PHY_CAPS);
372 if (!nl_caps)
373 return -ENOBUFS;
374
375 nl_channels = nla_nest_start_noflag(msg, NL802154_CAP_ATTR_CHANNELS);
376 if (!nl_channels)
377 return -ENOBUFS;
378
379 for (i = 0; i <= IEEE802154_MAX_PAGE; i++) {
380 if (caps->channels[i]) {
381 if (nl802154_put_flags(msg, i, caps->channels[i]))
382 return -ENOBUFS;
383 }
384 }
385
386 nla_nest_end(msg, nl_channels);
387
388 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
389 struct nlattr *nl_ed_lvls;
390
391 nl_ed_lvls = nla_nest_start_noflag(msg,
392 NL802154_CAP_ATTR_CCA_ED_LEVELS);
393 if (!nl_ed_lvls)
394 return -ENOBUFS;
395
396 for (i = 0; i < caps->cca_ed_levels_size; i++) {
397 if (nla_put_s32(msg, i, caps->cca_ed_levels[i]))
398 return -ENOBUFS;
399 }
400
401 nla_nest_end(msg, nl_ed_lvls);
402 }
403
404 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
405 struct nlattr *nl_tx_pwrs;
406
407 nl_tx_pwrs = nla_nest_start_noflag(msg,
408 NL802154_CAP_ATTR_TX_POWERS);
409 if (!nl_tx_pwrs)
410 return -ENOBUFS;
411
412 for (i = 0; i < caps->tx_powers_size; i++) {
413 if (nla_put_s32(msg, i, caps->tx_powers[i]))
414 return -ENOBUFS;
415 }
416
417 nla_nest_end(msg, nl_tx_pwrs);
418 }
419
420 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
421 if (nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_MODES,
422 caps->cca_modes) ||
423 nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_OPTS,
424 caps->cca_opts))
425 return -ENOBUFS;
426 }
427
428 if (nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MINBE, caps->min_minbe) ||
429 nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MINBE, caps->max_minbe) ||
430 nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MAXBE, caps->min_maxbe) ||
431 nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MAXBE, caps->max_maxbe) ||
432 nla_put_u8(msg, NL802154_CAP_ATTR_MIN_CSMA_BACKOFFS,
433 caps->min_csma_backoffs) ||
434 nla_put_u8(msg, NL802154_CAP_ATTR_MAX_CSMA_BACKOFFS,
435 caps->max_csma_backoffs) ||
436 nla_put_s8(msg, NL802154_CAP_ATTR_MIN_FRAME_RETRIES,
437 caps->min_frame_retries) ||
438 nla_put_s8(msg, NL802154_CAP_ATTR_MAX_FRAME_RETRIES,
439 caps->max_frame_retries) ||
440 nl802154_put_flags(msg, NL802154_CAP_ATTR_IFTYPES,
441 caps->iftypes) ||
442 nla_put_u32(msg, NL802154_CAP_ATTR_LBT, caps->lbt))
443 return -ENOBUFS;
444
445 nla_nest_end(msg, nl_caps);
446
447 return 0;
448 }
449
nl802154_send_wpan_phy(struct cfg802154_registered_device * rdev,enum nl802154_commands cmd,struct sk_buff * msg,u32 portid,u32 seq,int flags)450 static int nl802154_send_wpan_phy(struct cfg802154_registered_device *rdev,
451 enum nl802154_commands cmd,
452 struct sk_buff *msg, u32 portid, u32 seq,
453 int flags)
454 {
455 struct nlattr *nl_cmds;
456 void *hdr;
457 int i;
458
459 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
460 if (!hdr)
461 return -ENOBUFS;
462
463 if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
464 nla_put_string(msg, NL802154_ATTR_WPAN_PHY_NAME,
465 wpan_phy_name(&rdev->wpan_phy)) ||
466 nla_put_u32(msg, NL802154_ATTR_GENERATION,
467 cfg802154_rdev_list_generation))
468 goto nla_put_failure;
469
470 if (cmd != NL802154_CMD_NEW_WPAN_PHY)
471 goto finish;
472
473 /* DUMP PHY PIB */
474
475 /* current channel settings */
476 if (nla_put_u8(msg, NL802154_ATTR_PAGE,
477 rdev->wpan_phy.current_page) ||
478 nla_put_u8(msg, NL802154_ATTR_CHANNEL,
479 rdev->wpan_phy.current_channel))
480 goto nla_put_failure;
481
482 /* TODO remove this behaviour, we still keep support it for a while
483 * so users can change the behaviour to the new one.
484 */
485 if (nl802154_send_wpan_phy_channels(rdev, msg))
486 goto nla_put_failure;
487
488 /* cca mode */
489 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
490 if (nla_put_u32(msg, NL802154_ATTR_CCA_MODE,
491 rdev->wpan_phy.cca.mode))
492 goto nla_put_failure;
493
494 if (rdev->wpan_phy.cca.mode == NL802154_CCA_ENERGY_CARRIER) {
495 if (nla_put_u32(msg, NL802154_ATTR_CCA_OPT,
496 rdev->wpan_phy.cca.opt))
497 goto nla_put_failure;
498 }
499 }
500
501 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
502 if (nla_put_s32(msg, NL802154_ATTR_TX_POWER,
503 rdev->wpan_phy.transmit_power))
504 goto nla_put_failure;
505 }
506
507 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
508 if (nla_put_s32(msg, NL802154_ATTR_CCA_ED_LEVEL,
509 rdev->wpan_phy.cca_ed_level))
510 goto nla_put_failure;
511 }
512
513 if (nl802154_put_capabilities(msg, rdev))
514 goto nla_put_failure;
515
516 nl_cmds = nla_nest_start_noflag(msg, NL802154_ATTR_SUPPORTED_COMMANDS);
517 if (!nl_cmds)
518 goto nla_put_failure;
519
520 i = 0;
521 #define CMD(op, n) \
522 do { \
523 if (rdev->ops->op) { \
524 i++; \
525 if (nla_put_u32(msg, i, NL802154_CMD_ ## n)) \
526 goto nla_put_failure; \
527 } \
528 } while (0)
529
530 CMD(add_virtual_intf, NEW_INTERFACE);
531 CMD(del_virtual_intf, DEL_INTERFACE);
532 CMD(set_channel, SET_CHANNEL);
533 CMD(set_pan_id, SET_PAN_ID);
534 CMD(set_short_addr, SET_SHORT_ADDR);
535 CMD(set_backoff_exponent, SET_BACKOFF_EXPONENT);
536 CMD(set_max_csma_backoffs, SET_MAX_CSMA_BACKOFFS);
537 CMD(set_max_frame_retries, SET_MAX_FRAME_RETRIES);
538 CMD(set_lbt_mode, SET_LBT_MODE);
539 CMD(set_ackreq_default, SET_ACKREQ_DEFAULT);
540
541 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER)
542 CMD(set_tx_power, SET_TX_POWER);
543
544 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL)
545 CMD(set_cca_ed_level, SET_CCA_ED_LEVEL);
546
547 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE)
548 CMD(set_cca_mode, SET_CCA_MODE);
549
550 #undef CMD
551 nla_nest_end(msg, nl_cmds);
552
553 finish:
554 genlmsg_end(msg, hdr);
555 return 0;
556
557 nla_put_failure:
558 genlmsg_cancel(msg, hdr);
559 return -EMSGSIZE;
560 }
561
562 struct nl802154_dump_wpan_phy_state {
563 s64 filter_wpan_phy;
564 long start;
565
566 };
567
nl802154_dump_wpan_phy_parse(struct sk_buff * skb,struct netlink_callback * cb,struct nl802154_dump_wpan_phy_state * state)568 static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb,
569 struct netlink_callback *cb,
570 struct nl802154_dump_wpan_phy_state *state)
571 {
572 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
573 struct nlattr **tb = info->info.attrs;
574
575 if (tb[NL802154_ATTR_WPAN_PHY])
576 state->filter_wpan_phy = nla_get_u32(tb[NL802154_ATTR_WPAN_PHY]);
577 if (tb[NL802154_ATTR_WPAN_DEV])
578 state->filter_wpan_phy = nla_get_u64(tb[NL802154_ATTR_WPAN_DEV]) >> 32;
579 if (tb[NL802154_ATTR_IFINDEX]) {
580 struct net_device *netdev;
581 struct cfg802154_registered_device *rdev;
582 int ifidx = nla_get_u32(tb[NL802154_ATTR_IFINDEX]);
583
584 netdev = __dev_get_by_index(&init_net, ifidx);
585 if (!netdev)
586 return -ENODEV;
587 if (netdev->ieee802154_ptr) {
588 rdev = wpan_phy_to_rdev(
589 netdev->ieee802154_ptr->wpan_phy);
590 state->filter_wpan_phy = rdev->wpan_phy_idx;
591 }
592 }
593
594 return 0;
595 }
596
597 static int
nl802154_dump_wpan_phy(struct sk_buff * skb,struct netlink_callback * cb)598 nl802154_dump_wpan_phy(struct sk_buff *skb, struct netlink_callback *cb)
599 {
600 int idx = 0, ret;
601 struct nl802154_dump_wpan_phy_state *state = (void *)cb->args[0];
602 struct cfg802154_registered_device *rdev;
603
604 rtnl_lock();
605 if (!state) {
606 state = kzalloc(sizeof(*state), GFP_KERNEL);
607 if (!state) {
608 rtnl_unlock();
609 return -ENOMEM;
610 }
611 state->filter_wpan_phy = -1;
612 ret = nl802154_dump_wpan_phy_parse(skb, cb, state);
613 if (ret) {
614 kfree(state);
615 rtnl_unlock();
616 return ret;
617 }
618 cb->args[0] = (long)state;
619 }
620
621 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
622 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
623 continue;
624 if (++idx <= state->start)
625 continue;
626 if (state->filter_wpan_phy != -1 &&
627 state->filter_wpan_phy != rdev->wpan_phy_idx)
628 continue;
629 /* attempt to fit multiple wpan_phy data chunks into the skb */
630 ret = nl802154_send_wpan_phy(rdev,
631 NL802154_CMD_NEW_WPAN_PHY,
632 skb,
633 NETLINK_CB(cb->skb).portid,
634 cb->nlh->nlmsg_seq, NLM_F_MULTI);
635 if (ret < 0) {
636 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
637 !skb->len && cb->min_dump_alloc < 4096) {
638 cb->min_dump_alloc = 4096;
639 rtnl_unlock();
640 return 1;
641 }
642 idx--;
643 break;
644 }
645 break;
646 }
647 rtnl_unlock();
648
649 state->start = idx;
650
651 return skb->len;
652 }
653
nl802154_dump_wpan_phy_done(struct netlink_callback * cb)654 static int nl802154_dump_wpan_phy_done(struct netlink_callback *cb)
655 {
656 kfree((void *)cb->args[0]);
657 return 0;
658 }
659
nl802154_get_wpan_phy(struct sk_buff * skb,struct genl_info * info)660 static int nl802154_get_wpan_phy(struct sk_buff *skb, struct genl_info *info)
661 {
662 struct sk_buff *msg;
663 struct cfg802154_registered_device *rdev = info->user_ptr[0];
664
665 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
666 if (!msg)
667 return -ENOMEM;
668
669 if (nl802154_send_wpan_phy(rdev, NL802154_CMD_NEW_WPAN_PHY, msg,
670 info->snd_portid, info->snd_seq, 0) < 0) {
671 nlmsg_free(msg);
672 return -ENOBUFS;
673 }
674
675 return genlmsg_reply(msg, info);
676 }
677
wpan_dev_id(struct wpan_dev * wpan_dev)678 static inline u64 wpan_dev_id(struct wpan_dev *wpan_dev)
679 {
680 return (u64)wpan_dev->identifier |
681 ((u64)wpan_phy_to_rdev(wpan_dev->wpan_phy)->wpan_phy_idx << 32);
682 }
683
684 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
685 #include <net/ieee802154_netdev.h>
686
687 static int
ieee802154_llsec_send_key_id(struct sk_buff * msg,const struct ieee802154_llsec_key_id * desc)688 ieee802154_llsec_send_key_id(struct sk_buff *msg,
689 const struct ieee802154_llsec_key_id *desc)
690 {
691 struct nlattr *nl_dev_addr;
692
693 if (nla_put_u32(msg, NL802154_KEY_ID_ATTR_MODE, desc->mode))
694 return -ENOBUFS;
695
696 switch (desc->mode) {
697 case NL802154_KEY_ID_MODE_IMPLICIT:
698 nl_dev_addr = nla_nest_start_noflag(msg,
699 NL802154_KEY_ID_ATTR_IMPLICIT);
700 if (!nl_dev_addr)
701 return -ENOBUFS;
702
703 if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_PAN_ID,
704 desc->device_addr.pan_id) ||
705 nla_put_u32(msg, NL802154_DEV_ADDR_ATTR_MODE,
706 desc->device_addr.mode))
707 return -ENOBUFS;
708
709 switch (desc->device_addr.mode) {
710 case NL802154_DEV_ADDR_SHORT:
711 if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_SHORT,
712 desc->device_addr.short_addr))
713 return -ENOBUFS;
714 break;
715 case NL802154_DEV_ADDR_EXTENDED:
716 if (nla_put_le64(msg, NL802154_DEV_ADDR_ATTR_EXTENDED,
717 desc->device_addr.extended_addr,
718 NL802154_DEV_ADDR_ATTR_PAD))
719 return -ENOBUFS;
720 break;
721 default:
722 /* userspace should handle unknown */
723 break;
724 }
725
726 nla_nest_end(msg, nl_dev_addr);
727 break;
728 case NL802154_KEY_ID_MODE_INDEX:
729 break;
730 case NL802154_KEY_ID_MODE_INDEX_SHORT:
731 /* TODO renmae short_source? */
732 if (nla_put_le32(msg, NL802154_KEY_ID_ATTR_SOURCE_SHORT,
733 desc->short_source))
734 return -ENOBUFS;
735 break;
736 case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
737 if (nla_put_le64(msg, NL802154_KEY_ID_ATTR_SOURCE_EXTENDED,
738 desc->extended_source,
739 NL802154_KEY_ID_ATTR_PAD))
740 return -ENOBUFS;
741 break;
742 default:
743 /* userspace should handle unknown */
744 break;
745 }
746
747 /* TODO key_id to key_idx ? Check naming */
748 if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
749 if (nla_put_u8(msg, NL802154_KEY_ID_ATTR_INDEX, desc->id))
750 return -ENOBUFS;
751 }
752
753 return 0;
754 }
755
nl802154_get_llsec_params(struct sk_buff * msg,struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev)756 static int nl802154_get_llsec_params(struct sk_buff *msg,
757 struct cfg802154_registered_device *rdev,
758 struct wpan_dev *wpan_dev)
759 {
760 struct nlattr *nl_key_id;
761 struct ieee802154_llsec_params params;
762 int ret;
763
764 ret = rdev_get_llsec_params(rdev, wpan_dev, ¶ms);
765 if (ret < 0)
766 return ret;
767
768 if (nla_put_u8(msg, NL802154_ATTR_SEC_ENABLED, params.enabled) ||
769 nla_put_u32(msg, NL802154_ATTR_SEC_OUT_LEVEL, params.out_level) ||
770 nla_put_be32(msg, NL802154_ATTR_SEC_FRAME_COUNTER,
771 params.frame_counter))
772 return -ENOBUFS;
773
774 nl_key_id = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_OUT_KEY_ID);
775 if (!nl_key_id)
776 return -ENOBUFS;
777
778 ret = ieee802154_llsec_send_key_id(msg, ¶ms.out_key);
779 if (ret < 0)
780 return ret;
781
782 nla_nest_end(msg, nl_key_id);
783
784 return 0;
785 }
786 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
787
788 static int
nl802154_send_iface(struct sk_buff * msg,u32 portid,u32 seq,int flags,struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev)789 nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
790 struct cfg802154_registered_device *rdev,
791 struct wpan_dev *wpan_dev)
792 {
793 struct net_device *dev = wpan_dev->netdev;
794 void *hdr;
795
796 hdr = nl802154hdr_put(msg, portid, seq, flags,
797 NL802154_CMD_NEW_INTERFACE);
798 if (!hdr)
799 return -1;
800
801 if (dev &&
802 (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex) ||
803 nla_put_string(msg, NL802154_ATTR_IFNAME, dev->name)))
804 goto nla_put_failure;
805
806 if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
807 nla_put_u32(msg, NL802154_ATTR_IFTYPE, wpan_dev->iftype) ||
808 nla_put_u64_64bit(msg, NL802154_ATTR_WPAN_DEV,
809 wpan_dev_id(wpan_dev), NL802154_ATTR_PAD) ||
810 nla_put_u32(msg, NL802154_ATTR_GENERATION,
811 rdev->devlist_generation ^
812 (cfg802154_rdev_list_generation << 2)))
813 goto nla_put_failure;
814
815 /* address settings */
816 if (nla_put_le64(msg, NL802154_ATTR_EXTENDED_ADDR,
817 wpan_dev->extended_addr,
818 NL802154_ATTR_PAD) ||
819 nla_put_le16(msg, NL802154_ATTR_SHORT_ADDR,
820 wpan_dev->short_addr) ||
821 nla_put_le16(msg, NL802154_ATTR_PAN_ID, wpan_dev->pan_id))
822 goto nla_put_failure;
823
824 /* ARET handling */
825 if (nla_put_s8(msg, NL802154_ATTR_MAX_FRAME_RETRIES,
826 wpan_dev->frame_retries) ||
827 nla_put_u8(msg, NL802154_ATTR_MAX_BE, wpan_dev->max_be) ||
828 nla_put_u8(msg, NL802154_ATTR_MAX_CSMA_BACKOFFS,
829 wpan_dev->csma_retries) ||
830 nla_put_u8(msg, NL802154_ATTR_MIN_BE, wpan_dev->min_be))
831 goto nla_put_failure;
832
833 /* listen before transmit */
834 if (nla_put_u8(msg, NL802154_ATTR_LBT_MODE, wpan_dev->lbt))
835 goto nla_put_failure;
836
837 /* ackreq default behaviour */
838 if (nla_put_u8(msg, NL802154_ATTR_ACKREQ_DEFAULT, wpan_dev->ackreq))
839 goto nla_put_failure;
840
841 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
842 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
843 goto out;
844
845 if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
846 goto nla_put_failure;
847
848 out:
849 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
850
851 genlmsg_end(msg, hdr);
852 return 0;
853
854 nla_put_failure:
855 genlmsg_cancel(msg, hdr);
856 return -EMSGSIZE;
857 }
858
859 static int
nl802154_dump_interface(struct sk_buff * skb,struct netlink_callback * cb)860 nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
861 {
862 int wp_idx = 0;
863 int if_idx = 0;
864 int wp_start = cb->args[0];
865 int if_start = cb->args[1];
866 struct cfg802154_registered_device *rdev;
867 struct wpan_dev *wpan_dev;
868
869 rtnl_lock();
870 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
871 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
872 continue;
873 if (wp_idx < wp_start) {
874 wp_idx++;
875 continue;
876 }
877 if_idx = 0;
878
879 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
880 if (if_idx < if_start) {
881 if_idx++;
882 continue;
883 }
884 if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid,
885 cb->nlh->nlmsg_seq, NLM_F_MULTI,
886 rdev, wpan_dev) < 0) {
887 goto out;
888 }
889 if_idx++;
890 }
891
892 wp_idx++;
893 }
894 out:
895 rtnl_unlock();
896
897 cb->args[0] = wp_idx;
898 cb->args[1] = if_idx;
899
900 return skb->len;
901 }
902
nl802154_get_interface(struct sk_buff * skb,struct genl_info * info)903 static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info)
904 {
905 struct sk_buff *msg;
906 struct cfg802154_registered_device *rdev = info->user_ptr[0];
907 struct wpan_dev *wdev = info->user_ptr[1];
908
909 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
910 if (!msg)
911 return -ENOMEM;
912
913 if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0,
914 rdev, wdev) < 0) {
915 nlmsg_free(msg);
916 return -ENOBUFS;
917 }
918
919 return genlmsg_reply(msg, info);
920 }
921
nl802154_new_interface(struct sk_buff * skb,struct genl_info * info)922 static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
923 {
924 struct cfg802154_registered_device *rdev = info->user_ptr[0];
925 enum nl802154_iftype type = NL802154_IFTYPE_UNSPEC;
926 __le64 extended_addr = cpu_to_le64(0x0000000000000000ULL);
927
928 /* TODO avoid failing a new interface
929 * creation due to pending removal?
930 */
931
932 if (!info->attrs[NL802154_ATTR_IFNAME])
933 return -EINVAL;
934
935 if (info->attrs[NL802154_ATTR_IFTYPE]) {
936 type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]);
937 if (type > NL802154_IFTYPE_MAX ||
938 !(rdev->wpan_phy.supported.iftypes & BIT(type)))
939 return -EINVAL;
940 }
941
942 if (info->attrs[NL802154_ATTR_EXTENDED_ADDR])
943 extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
944
945 if (!rdev->ops->add_virtual_intf)
946 return -EOPNOTSUPP;
947
948 return rdev_add_virtual_intf(rdev,
949 nla_data(info->attrs[NL802154_ATTR_IFNAME]),
950 NET_NAME_USER, type, extended_addr);
951 }
952
nl802154_del_interface(struct sk_buff * skb,struct genl_info * info)953 static int nl802154_del_interface(struct sk_buff *skb, struct genl_info *info)
954 {
955 struct cfg802154_registered_device *rdev = info->user_ptr[0];
956 struct wpan_dev *wpan_dev = info->user_ptr[1];
957
958 if (!rdev->ops->del_virtual_intf)
959 return -EOPNOTSUPP;
960
961 /* If we remove a wpan device without a netdev then clear
962 * user_ptr[1] so that nl802154_post_doit won't dereference it
963 * to check if it needs to do dev_put(). Otherwise it crashes
964 * since the wpan_dev has been freed, unlike with a netdev where
965 * we need the dev_put() for the netdev to really be freed.
966 */
967 if (!wpan_dev->netdev)
968 info->user_ptr[1] = NULL;
969
970 return rdev_del_virtual_intf(rdev, wpan_dev);
971 }
972
nl802154_set_channel(struct sk_buff * skb,struct genl_info * info)973 static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
974 {
975 struct cfg802154_registered_device *rdev = info->user_ptr[0];
976 u8 channel, page;
977
978 if (!info->attrs[NL802154_ATTR_PAGE] ||
979 !info->attrs[NL802154_ATTR_CHANNEL])
980 return -EINVAL;
981
982 page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
983 channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
984
985 /* check 802.15.4 constraints */
986 if (!ieee802154_chan_is_valid(&rdev->wpan_phy, page, channel))
987 return -EINVAL;
988
989 return rdev_set_channel(rdev, page, channel);
990 }
991
nl802154_set_cca_mode(struct sk_buff * skb,struct genl_info * info)992 static int nl802154_set_cca_mode(struct sk_buff *skb, struct genl_info *info)
993 {
994 struct cfg802154_registered_device *rdev = info->user_ptr[0];
995 struct wpan_phy_cca cca;
996
997 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE))
998 return -EOPNOTSUPP;
999
1000 if (!info->attrs[NL802154_ATTR_CCA_MODE])
1001 return -EINVAL;
1002
1003 cca.mode = nla_get_u32(info->attrs[NL802154_ATTR_CCA_MODE]);
1004 /* checking 802.15.4 constraints */
1005 if (cca.mode < NL802154_CCA_ENERGY ||
1006 cca.mode > NL802154_CCA_ATTR_MAX ||
1007 !(rdev->wpan_phy.supported.cca_modes & BIT(cca.mode)))
1008 return -EINVAL;
1009
1010 if (cca.mode == NL802154_CCA_ENERGY_CARRIER) {
1011 if (!info->attrs[NL802154_ATTR_CCA_OPT])
1012 return -EINVAL;
1013
1014 cca.opt = nla_get_u32(info->attrs[NL802154_ATTR_CCA_OPT]);
1015 if (cca.opt > NL802154_CCA_OPT_ATTR_MAX ||
1016 !(rdev->wpan_phy.supported.cca_opts & BIT(cca.opt)))
1017 return -EINVAL;
1018 }
1019
1020 return rdev_set_cca_mode(rdev, &cca);
1021 }
1022
nl802154_set_cca_ed_level(struct sk_buff * skb,struct genl_info * info)1023 static int nl802154_set_cca_ed_level(struct sk_buff *skb, struct genl_info *info)
1024 {
1025 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1026 s32 ed_level;
1027 int i;
1028
1029 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL))
1030 return -EOPNOTSUPP;
1031
1032 if (!info->attrs[NL802154_ATTR_CCA_ED_LEVEL])
1033 return -EINVAL;
1034
1035 ed_level = nla_get_s32(info->attrs[NL802154_ATTR_CCA_ED_LEVEL]);
1036
1037 for (i = 0; i < rdev->wpan_phy.supported.cca_ed_levels_size; i++) {
1038 if (ed_level == rdev->wpan_phy.supported.cca_ed_levels[i])
1039 return rdev_set_cca_ed_level(rdev, ed_level);
1040 }
1041
1042 return -EINVAL;
1043 }
1044
nl802154_set_tx_power(struct sk_buff * skb,struct genl_info * info)1045 static int nl802154_set_tx_power(struct sk_buff *skb, struct genl_info *info)
1046 {
1047 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1048 s32 power;
1049 int i;
1050
1051 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER))
1052 return -EOPNOTSUPP;
1053
1054 if (!info->attrs[NL802154_ATTR_TX_POWER])
1055 return -EINVAL;
1056
1057 power = nla_get_s32(info->attrs[NL802154_ATTR_TX_POWER]);
1058
1059 for (i = 0; i < rdev->wpan_phy.supported.tx_powers_size; i++) {
1060 if (power == rdev->wpan_phy.supported.tx_powers[i])
1061 return rdev_set_tx_power(rdev, power);
1062 }
1063
1064 return -EINVAL;
1065 }
1066
nl802154_set_pan_id(struct sk_buff * skb,struct genl_info * info)1067 static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
1068 {
1069 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1070 struct net_device *dev = info->user_ptr[1];
1071 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1072 __le16 pan_id;
1073
1074 /* conflict here while tx/rx calls */
1075 if (netif_running(dev))
1076 return -EBUSY;
1077
1078 if (wpan_dev->lowpan_dev) {
1079 if (netif_running(wpan_dev->lowpan_dev))
1080 return -EBUSY;
1081 }
1082
1083 /* don't change address fields on monitor */
1084 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1085 !info->attrs[NL802154_ATTR_PAN_ID])
1086 return -EINVAL;
1087
1088 pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
1089
1090 /* Only allow changing the PAN ID when the device has no more
1091 * associations ongoing to avoid confusing peers.
1092 */
1093 if (cfg802154_device_is_associated(wpan_dev)) {
1094 NL_SET_ERR_MSG(info->extack,
1095 "Existing associations, changing PAN ID forbidden");
1096 return -EINVAL;
1097 }
1098
1099 return rdev_set_pan_id(rdev, wpan_dev, pan_id);
1100 }
1101
nl802154_set_short_addr(struct sk_buff * skb,struct genl_info * info)1102 static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
1103 {
1104 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1105 struct net_device *dev = info->user_ptr[1];
1106 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1107 __le16 short_addr;
1108
1109 /* conflict here while tx/rx calls */
1110 if (netif_running(dev))
1111 return -EBUSY;
1112
1113 if (wpan_dev->lowpan_dev) {
1114 if (netif_running(wpan_dev->lowpan_dev))
1115 return -EBUSY;
1116 }
1117
1118 /* don't change address fields on monitor */
1119 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1120 !info->attrs[NL802154_ATTR_SHORT_ADDR])
1121 return -EINVAL;
1122
1123 short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
1124
1125 /* The short address only has a meaning when part of a PAN, after a
1126 * proper association procedure. However, we want to still offer the
1127 * possibility to create static networks so changing the short address
1128 * is only allowed when not already associated to other devices with
1129 * the official handshake.
1130 */
1131 if (cfg802154_device_is_associated(wpan_dev)) {
1132 NL_SET_ERR_MSG(info->extack,
1133 "Existing associations, changing short address forbidden");
1134 return -EINVAL;
1135 }
1136
1137 return rdev_set_short_addr(rdev, wpan_dev, short_addr);
1138 }
1139
1140 static int
nl802154_set_backoff_exponent(struct sk_buff * skb,struct genl_info * info)1141 nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info)
1142 {
1143 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1144 struct net_device *dev = info->user_ptr[1];
1145 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1146 u8 min_be, max_be;
1147
1148 /* should be set on netif open inside phy settings */
1149 if (netif_running(dev))
1150 return -EBUSY;
1151
1152 if (!info->attrs[NL802154_ATTR_MIN_BE] ||
1153 !info->attrs[NL802154_ATTR_MAX_BE])
1154 return -EINVAL;
1155
1156 min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]);
1157 max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]);
1158
1159 /* check 802.15.4 constraints */
1160 if (min_be < rdev->wpan_phy.supported.min_minbe ||
1161 min_be > rdev->wpan_phy.supported.max_minbe ||
1162 max_be < rdev->wpan_phy.supported.min_maxbe ||
1163 max_be > rdev->wpan_phy.supported.max_maxbe ||
1164 min_be > max_be)
1165 return -EINVAL;
1166
1167 return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);
1168 }
1169
1170 static int
nl802154_set_max_csma_backoffs(struct sk_buff * skb,struct genl_info * info)1171 nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
1172 {
1173 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1174 struct net_device *dev = info->user_ptr[1];
1175 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1176 u8 max_csma_backoffs;
1177
1178 /* conflict here while other running iface settings */
1179 if (netif_running(dev))
1180 return -EBUSY;
1181
1182 if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])
1183 return -EINVAL;
1184
1185 max_csma_backoffs = nla_get_u8(
1186 info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);
1187
1188 /* check 802.15.4 constraints */
1189 if (max_csma_backoffs < rdev->wpan_phy.supported.min_csma_backoffs ||
1190 max_csma_backoffs > rdev->wpan_phy.supported.max_csma_backoffs)
1191 return -EINVAL;
1192
1193 return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
1194 }
1195
1196 static int
nl802154_set_max_frame_retries(struct sk_buff * skb,struct genl_info * info)1197 nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
1198 {
1199 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1200 struct net_device *dev = info->user_ptr[1];
1201 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1202 s8 max_frame_retries;
1203
1204 if (netif_running(dev))
1205 return -EBUSY;
1206
1207 if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES])
1208 return -EINVAL;
1209
1210 max_frame_retries = nla_get_s8(
1211 info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]);
1212
1213 /* check 802.15.4 constraints */
1214 if (max_frame_retries < rdev->wpan_phy.supported.min_frame_retries ||
1215 max_frame_retries > rdev->wpan_phy.supported.max_frame_retries)
1216 return -EINVAL;
1217
1218 return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
1219 }
1220
nl802154_set_lbt_mode(struct sk_buff * skb,struct genl_info * info)1221 static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
1222 {
1223 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1224 struct net_device *dev = info->user_ptr[1];
1225 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1226 int mode;
1227
1228 if (netif_running(dev))
1229 return -EBUSY;
1230
1231 if (!info->attrs[NL802154_ATTR_LBT_MODE])
1232 return -EINVAL;
1233
1234 mode = nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
1235
1236 if (mode != 0 && mode != 1)
1237 return -EINVAL;
1238
1239 if (!wpan_phy_supported_bool(mode, rdev->wpan_phy.supported.lbt))
1240 return -EINVAL;
1241
1242 return rdev_set_lbt_mode(rdev, wpan_dev, mode);
1243 }
1244
1245 static int
nl802154_set_ackreq_default(struct sk_buff * skb,struct genl_info * info)1246 nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
1247 {
1248 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1249 struct net_device *dev = info->user_ptr[1];
1250 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1251 int ackreq;
1252
1253 if (netif_running(dev))
1254 return -EBUSY;
1255
1256 if (!info->attrs[NL802154_ATTR_ACKREQ_DEFAULT])
1257 return -EINVAL;
1258
1259 ackreq = nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
1260
1261 if (ackreq != 0 && ackreq != 1)
1262 return -EINVAL;
1263
1264 return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
1265 }
1266
nl802154_wpan_phy_netns(struct sk_buff * skb,struct genl_info * info)1267 static int nl802154_wpan_phy_netns(struct sk_buff *skb, struct genl_info *info)
1268 {
1269 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1270 struct net *net;
1271 int err;
1272
1273 if (info->attrs[NL802154_ATTR_PID]) {
1274 u32 pid = nla_get_u32(info->attrs[NL802154_ATTR_PID]);
1275
1276 net = get_net_ns_by_pid(pid);
1277 } else if (info->attrs[NL802154_ATTR_NETNS_FD]) {
1278 u32 fd = nla_get_u32(info->attrs[NL802154_ATTR_NETNS_FD]);
1279
1280 net = get_net_ns_by_fd(fd);
1281 } else {
1282 return -EINVAL;
1283 }
1284
1285 if (IS_ERR(net))
1286 return PTR_ERR(net);
1287
1288 err = 0;
1289
1290 /* check if anything to do */
1291 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), net))
1292 err = cfg802154_switch_netns(rdev, net);
1293
1294 put_net(net);
1295 return err;
1296 }
1297
nl802154_prep_scan_event_msg(struct sk_buff * msg,struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev,u32 portid,u32 seq,int flags,u8 cmd,struct ieee802154_coord_desc * desc)1298 static int nl802154_prep_scan_event_msg(struct sk_buff *msg,
1299 struct cfg802154_registered_device *rdev,
1300 struct wpan_dev *wpan_dev,
1301 u32 portid, u32 seq, int flags, u8 cmd,
1302 struct ieee802154_coord_desc *desc)
1303 {
1304 struct nlattr *nla;
1305 void *hdr;
1306
1307 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1308 if (!hdr)
1309 return -ENOBUFS;
1310
1311 if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx))
1312 goto nla_put_failure;
1313
1314 if (wpan_dev->netdev &&
1315 nla_put_u32(msg, NL802154_ATTR_IFINDEX, wpan_dev->netdev->ifindex))
1316 goto nla_put_failure;
1317
1318 if (nla_put_u64_64bit(msg, NL802154_ATTR_WPAN_DEV,
1319 wpan_dev_id(wpan_dev), NL802154_ATTR_PAD))
1320 goto nla_put_failure;
1321
1322 nla = nla_nest_start_noflag(msg, NL802154_ATTR_COORDINATOR);
1323 if (!nla)
1324 goto nla_put_failure;
1325
1326 if (nla_put(msg, NL802154_COORD_PANID, IEEE802154_PAN_ID_LEN,
1327 &desc->addr.pan_id))
1328 goto nla_put_failure;
1329
1330 if (desc->addr.mode == IEEE802154_ADDR_SHORT) {
1331 if (nla_put(msg, NL802154_COORD_ADDR,
1332 IEEE802154_SHORT_ADDR_LEN,
1333 &desc->addr.short_addr))
1334 goto nla_put_failure;
1335 } else {
1336 if (nla_put(msg, NL802154_COORD_ADDR,
1337 IEEE802154_EXTENDED_ADDR_LEN,
1338 &desc->addr.extended_addr))
1339 goto nla_put_failure;
1340 }
1341
1342 if (nla_put_u8(msg, NL802154_COORD_CHANNEL, desc->channel))
1343 goto nla_put_failure;
1344
1345 if (nla_put_u8(msg, NL802154_COORD_PAGE, desc->page))
1346 goto nla_put_failure;
1347
1348 if (nla_put_u16(msg, NL802154_COORD_SUPERFRAME_SPEC,
1349 desc->superframe_spec))
1350 goto nla_put_failure;
1351
1352 if (nla_put_u8(msg, NL802154_COORD_LINK_QUALITY, desc->link_quality))
1353 goto nla_put_failure;
1354
1355 if (desc->gts_permit && nla_put_flag(msg, NL802154_COORD_GTS_PERMIT))
1356 goto nla_put_failure;
1357
1358 /* TODO: NL802154_COORD_PAYLOAD_DATA if any */
1359
1360 nla_nest_end(msg, nla);
1361
1362 genlmsg_end(msg, hdr);
1363
1364 return 0;
1365
1366 nla_put_failure:
1367 genlmsg_cancel(msg, hdr);
1368
1369 return -EMSGSIZE;
1370 }
1371
nl802154_scan_event(struct wpan_phy * wpan_phy,struct wpan_dev * wpan_dev,struct ieee802154_coord_desc * desc)1372 int nl802154_scan_event(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
1373 struct ieee802154_coord_desc *desc)
1374 {
1375 struct cfg802154_registered_device *rdev = wpan_phy_to_rdev(wpan_phy);
1376 struct sk_buff *msg;
1377 int ret;
1378
1379 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
1380 if (!msg)
1381 return -ENOMEM;
1382
1383 ret = nl802154_prep_scan_event_msg(msg, rdev, wpan_dev, 0, 0, 0,
1384 NL802154_CMD_SCAN_EVENT,
1385 desc);
1386 if (ret < 0) {
1387 nlmsg_free(msg);
1388 return ret;
1389 }
1390
1391 return genlmsg_multicast_netns(&nl802154_fam, wpan_phy_net(wpan_phy),
1392 msg, 0, NL802154_MCGRP_SCAN, GFP_ATOMIC);
1393 }
1394 EXPORT_SYMBOL_GPL(nl802154_scan_event);
1395
nl802154_trigger_scan(struct sk_buff * skb,struct genl_info * info)1396 static int nl802154_trigger_scan(struct sk_buff *skb, struct genl_info *info)
1397 {
1398 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1399 struct net_device *dev = info->user_ptr[1];
1400 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1401 struct wpan_phy *wpan_phy = &rdev->wpan_phy;
1402 struct cfg802154_scan_request *request;
1403 u8 type;
1404 int err;
1405
1406 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
1407 NL_SET_ERR_MSG(info->extack, "Monitors are not allowed to perform scans");
1408 return -EOPNOTSUPP;
1409 }
1410
1411 if (!info->attrs[NL802154_ATTR_SCAN_TYPE]) {
1412 NL_SET_ERR_MSG(info->extack, "Malformed request, missing scan type");
1413 return -EINVAL;
1414 }
1415
1416 if (wpan_phy->flags & WPAN_PHY_FLAG_DATAGRAMS_ONLY) {
1417 NL_SET_ERR_MSG(info->extack, "PHY only supports datagrams");
1418 return -EOPNOTSUPP;
1419 }
1420
1421 request = kzalloc(sizeof(*request), GFP_KERNEL);
1422 if (!request)
1423 return -ENOMEM;
1424
1425 request->wpan_dev = wpan_dev;
1426 request->wpan_phy = wpan_phy;
1427
1428 type = nla_get_u8(info->attrs[NL802154_ATTR_SCAN_TYPE]);
1429 switch (type) {
1430 case NL802154_SCAN_ACTIVE:
1431 case NL802154_SCAN_PASSIVE:
1432 request->type = type;
1433 break;
1434 default:
1435 NL_SET_ERR_MSG_FMT(info->extack, "Unsupported scan type: %d", type);
1436 err = -EINVAL;
1437 goto free_request;
1438 }
1439
1440 /* Use current page by default */
1441 if (info->attrs[NL802154_ATTR_PAGE])
1442 request->page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
1443 else
1444 request->page = wpan_phy->current_page;
1445
1446 /* Scan all supported channels by default */
1447 if (info->attrs[NL802154_ATTR_SCAN_CHANNELS])
1448 request->channels = nla_get_u32(info->attrs[NL802154_ATTR_SCAN_CHANNELS]);
1449 else
1450 request->channels = wpan_phy->supported.channels[request->page];
1451
1452 /* Use maximum duration order by default */
1453 if (info->attrs[NL802154_ATTR_SCAN_DURATION])
1454 request->duration = nla_get_u8(info->attrs[NL802154_ATTR_SCAN_DURATION]);
1455 else
1456 request->duration = IEEE802154_MAX_SCAN_DURATION;
1457
1458 err = rdev_trigger_scan(rdev, request);
1459 if (err) {
1460 pr_err("Failure starting scanning (%d)\n", err);
1461 goto free_request;
1462 }
1463
1464 return 0;
1465
1466 free_request:
1467 kfree(request);
1468
1469 return err;
1470 }
1471
nl802154_prep_scan_msg(struct sk_buff * msg,struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev,u32 portid,u32 seq,int flags,u8 cmd,u8 arg)1472 static int nl802154_prep_scan_msg(struct sk_buff *msg,
1473 struct cfg802154_registered_device *rdev,
1474 struct wpan_dev *wpan_dev, u32 portid,
1475 u32 seq, int flags, u8 cmd, u8 arg)
1476 {
1477 void *hdr;
1478
1479 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1480 if (!hdr)
1481 return -ENOBUFS;
1482
1483 if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx))
1484 goto nla_put_failure;
1485
1486 if (wpan_dev->netdev &&
1487 nla_put_u32(msg, NL802154_ATTR_IFINDEX, wpan_dev->netdev->ifindex))
1488 goto nla_put_failure;
1489
1490 if (nla_put_u64_64bit(msg, NL802154_ATTR_WPAN_DEV,
1491 wpan_dev_id(wpan_dev), NL802154_ATTR_PAD))
1492 goto nla_put_failure;
1493
1494 if (cmd == NL802154_CMD_SCAN_DONE &&
1495 nla_put_u8(msg, NL802154_ATTR_SCAN_DONE_REASON, arg))
1496 goto nla_put_failure;
1497
1498 genlmsg_end(msg, hdr);
1499
1500 return 0;
1501
1502 nla_put_failure:
1503 genlmsg_cancel(msg, hdr);
1504
1505 return -EMSGSIZE;
1506 }
1507
nl802154_send_scan_msg(struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev,u8 cmd,u8 arg)1508 static int nl802154_send_scan_msg(struct cfg802154_registered_device *rdev,
1509 struct wpan_dev *wpan_dev, u8 cmd, u8 arg)
1510 {
1511 struct sk_buff *msg;
1512 int ret;
1513
1514 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
1515 if (!msg)
1516 return -ENOMEM;
1517
1518 ret = nl802154_prep_scan_msg(msg, rdev, wpan_dev, 0, 0, 0, cmd, arg);
1519 if (ret < 0) {
1520 nlmsg_free(msg);
1521 return ret;
1522 }
1523
1524 return genlmsg_multicast_netns(&nl802154_fam,
1525 wpan_phy_net(&rdev->wpan_phy), msg, 0,
1526 NL802154_MCGRP_SCAN, GFP_KERNEL);
1527 }
1528
nl802154_scan_started(struct wpan_phy * wpan_phy,struct wpan_dev * wpan_dev)1529 int nl802154_scan_started(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev)
1530 {
1531 struct cfg802154_registered_device *rdev = wpan_phy_to_rdev(wpan_phy);
1532 int err;
1533
1534 /* Ignore errors when there are no listeners */
1535 err = nl802154_send_scan_msg(rdev, wpan_dev, NL802154_CMD_TRIGGER_SCAN, 0);
1536 if (err == -ESRCH)
1537 err = 0;
1538
1539 return err;
1540 }
1541 EXPORT_SYMBOL_GPL(nl802154_scan_started);
1542
nl802154_scan_done(struct wpan_phy * wpan_phy,struct wpan_dev * wpan_dev,enum nl802154_scan_done_reasons reason)1543 int nl802154_scan_done(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
1544 enum nl802154_scan_done_reasons reason)
1545 {
1546 struct cfg802154_registered_device *rdev = wpan_phy_to_rdev(wpan_phy);
1547 int err;
1548
1549 /* Ignore errors when there are no listeners */
1550 err = nl802154_send_scan_msg(rdev, wpan_dev, NL802154_CMD_SCAN_DONE, reason);
1551 if (err == -ESRCH)
1552 err = 0;
1553
1554 return err;
1555 }
1556 EXPORT_SYMBOL_GPL(nl802154_scan_done);
1557
nl802154_abort_scan(struct sk_buff * skb,struct genl_info * info)1558 static int nl802154_abort_scan(struct sk_buff *skb, struct genl_info *info)
1559 {
1560 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1561 struct net_device *dev = info->user_ptr[1];
1562 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1563
1564 /* Resources are released in the notification helper above */
1565 return rdev_abort_scan(rdev, wpan_dev);
1566 }
1567
1568 static int
nl802154_send_beacons(struct sk_buff * skb,struct genl_info * info)1569 nl802154_send_beacons(struct sk_buff *skb, struct genl_info *info)
1570 {
1571 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1572 struct net_device *dev = info->user_ptr[1];
1573 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1574 struct wpan_phy *wpan_phy = &rdev->wpan_phy;
1575 struct cfg802154_beacon_request *request;
1576 int err;
1577
1578 if (wpan_dev->iftype != NL802154_IFTYPE_COORD) {
1579 NL_SET_ERR_MSG(info->extack, "Only coordinators can send beacons");
1580 return -EOPNOTSUPP;
1581 }
1582
1583 if (wpan_dev->pan_id == cpu_to_le16(IEEE802154_PANID_BROADCAST)) {
1584 NL_SET_ERR_MSG(info->extack, "Device is not part of any PAN");
1585 return -EPERM;
1586 }
1587
1588 if (wpan_phy->flags & WPAN_PHY_FLAG_DATAGRAMS_ONLY) {
1589 NL_SET_ERR_MSG(info->extack, "PHY only supports datagrams");
1590 return -EOPNOTSUPP;
1591 }
1592
1593 request = kzalloc(sizeof(*request), GFP_KERNEL);
1594 if (!request)
1595 return -ENOMEM;
1596
1597 request->wpan_dev = wpan_dev;
1598 request->wpan_phy = wpan_phy;
1599
1600 /* Use maximum duration order by default */
1601 if (info->attrs[NL802154_ATTR_BEACON_INTERVAL])
1602 request->interval = nla_get_u8(info->attrs[NL802154_ATTR_BEACON_INTERVAL]);
1603 else
1604 request->interval = IEEE802154_MAX_SCAN_DURATION;
1605
1606 err = rdev_send_beacons(rdev, request);
1607 if (err) {
1608 pr_err("Failure starting sending beacons (%d)\n", err);
1609 goto free_request;
1610 }
1611
1612 return 0;
1613
1614 free_request:
1615 kfree(request);
1616
1617 return err;
1618 }
1619
nl802154_beaconing_done(struct wpan_dev * wpan_dev)1620 void nl802154_beaconing_done(struct wpan_dev *wpan_dev)
1621 {
1622 /* NOP */
1623 }
1624 EXPORT_SYMBOL_GPL(nl802154_beaconing_done);
1625
1626 static int
nl802154_stop_beacons(struct sk_buff * skb,struct genl_info * info)1627 nl802154_stop_beacons(struct sk_buff *skb, struct genl_info *info)
1628 {
1629 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1630 struct net_device *dev = info->user_ptr[1];
1631 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1632
1633 /* Resources are released in the notification helper above */
1634 return rdev_stop_beacons(rdev, wpan_dev);
1635 }
1636
nl802154_associate(struct sk_buff * skb,struct genl_info * info)1637 static int nl802154_associate(struct sk_buff *skb, struct genl_info *info)
1638 {
1639 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1640 struct net_device *dev = info->user_ptr[1];
1641 struct wpan_dev *wpan_dev;
1642 struct wpan_phy *wpan_phy;
1643 struct ieee802154_addr coord;
1644 int err;
1645
1646 wpan_dev = dev->ieee802154_ptr;
1647 wpan_phy = &rdev->wpan_phy;
1648
1649 if (wpan_phy->flags & WPAN_PHY_FLAG_DATAGRAMS_ONLY) {
1650 NL_SET_ERR_MSG(info->extack, "PHY only supports datagrams");
1651 return -EOPNOTSUPP;
1652 }
1653
1654 if (!info->attrs[NL802154_ATTR_PAN_ID] ||
1655 !info->attrs[NL802154_ATTR_EXTENDED_ADDR])
1656 return -EINVAL;
1657
1658 coord.pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
1659 coord.mode = IEEE802154_ADDR_LONG;
1660 coord.extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
1661
1662 mutex_lock(&wpan_dev->association_lock);
1663 err = rdev_associate(rdev, wpan_dev, &coord);
1664 mutex_unlock(&wpan_dev->association_lock);
1665 if (err)
1666 pr_err("Association with PAN ID 0x%x failed (%d)\n",
1667 le16_to_cpu(coord.pan_id), err);
1668
1669 return err;
1670 }
1671
nl802154_disassociate(struct sk_buff * skb,struct genl_info * info)1672 static int nl802154_disassociate(struct sk_buff *skb, struct genl_info *info)
1673 {
1674 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1675 struct net_device *dev = info->user_ptr[1];
1676 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1677 struct wpan_phy *wpan_phy = &rdev->wpan_phy;
1678 struct ieee802154_addr target;
1679
1680 if (wpan_phy->flags & WPAN_PHY_FLAG_DATAGRAMS_ONLY) {
1681 NL_SET_ERR_MSG(info->extack, "PHY only supports datagrams");
1682 return -EOPNOTSUPP;
1683 }
1684
1685 target.pan_id = wpan_dev->pan_id;
1686
1687 if (info->attrs[NL802154_ATTR_EXTENDED_ADDR]) {
1688 target.mode = IEEE802154_ADDR_LONG;
1689 target.extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
1690 } else if (info->attrs[NL802154_ATTR_SHORT_ADDR]) {
1691 target.mode = IEEE802154_ADDR_SHORT;
1692 target.short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
1693 } else {
1694 NL_SET_ERR_MSG(info->extack, "Device address is missing");
1695 return -EINVAL;
1696 }
1697
1698 mutex_lock(&wpan_dev->association_lock);
1699 rdev_disassociate(rdev, wpan_dev, &target);
1700 mutex_unlock(&wpan_dev->association_lock);
1701
1702 return 0;
1703 }
1704
nl802154_set_max_associations(struct sk_buff * skb,struct genl_info * info)1705 static int nl802154_set_max_associations(struct sk_buff *skb, struct genl_info *info)
1706 {
1707 struct net_device *dev = info->user_ptr[1];
1708 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1709 unsigned int max_assoc;
1710
1711 if (!info->attrs[NL802154_ATTR_MAX_ASSOCIATIONS]) {
1712 NL_SET_ERR_MSG(info->extack, "No maximum number of association given");
1713 return -EINVAL;
1714 }
1715
1716 max_assoc = nla_get_u32(info->attrs[NL802154_ATTR_MAX_ASSOCIATIONS]);
1717
1718 mutex_lock(&wpan_dev->association_lock);
1719 cfg802154_set_max_associations(wpan_dev, max_assoc);
1720 mutex_unlock(&wpan_dev->association_lock);
1721
1722 return 0;
1723 }
1724
nl802154_send_peer_info(struct sk_buff * msg,struct netlink_callback * cb,u32 seq,int flags,struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev,struct ieee802154_pan_device * peer,enum nl802154_peer_type type)1725 static int nl802154_send_peer_info(struct sk_buff *msg,
1726 struct netlink_callback *cb,
1727 u32 seq, int flags,
1728 struct cfg802154_registered_device *rdev,
1729 struct wpan_dev *wpan_dev,
1730 struct ieee802154_pan_device *peer,
1731 enum nl802154_peer_type type)
1732 {
1733 struct nlattr *nla;
1734 void *hdr;
1735
1736 ASSERT_RTNL();
1737
1738 hdr = nl802154hdr_put(msg, NETLINK_CB(cb->skb).portid, seq, flags,
1739 NL802154_CMD_LIST_ASSOCIATIONS);
1740 if (!hdr)
1741 return -ENOBUFS;
1742
1743 genl_dump_check_consistent(cb, hdr);
1744
1745 nla = nla_nest_start_noflag(msg, NL802154_ATTR_PEER);
1746 if (!nla)
1747 goto nla_put_failure;
1748
1749 if (nla_put_u8(msg, NL802154_DEV_ADDR_ATTR_PEER_TYPE, type))
1750 goto nla_put_failure;
1751
1752 if (nla_put_u8(msg, NL802154_DEV_ADDR_ATTR_MODE, peer->mode))
1753 goto nla_put_failure;
1754
1755 if (nla_put(msg, NL802154_DEV_ADDR_ATTR_SHORT,
1756 IEEE802154_SHORT_ADDR_LEN, &peer->short_addr))
1757 goto nla_put_failure;
1758
1759 if (nla_put(msg, NL802154_DEV_ADDR_ATTR_EXTENDED,
1760 IEEE802154_EXTENDED_ADDR_LEN, &peer->extended_addr))
1761 goto nla_put_failure;
1762
1763 nla_nest_end(msg, nla);
1764
1765 genlmsg_end(msg, hdr);
1766
1767 return 0;
1768
1769 nla_put_failure:
1770 genlmsg_cancel(msg, hdr);
1771 return -EMSGSIZE;
1772 }
1773
nl802154_list_associations(struct sk_buff * skb,struct netlink_callback * cb)1774 static int nl802154_list_associations(struct sk_buff *skb,
1775 struct netlink_callback *cb)
1776 {
1777 struct cfg802154_registered_device *rdev;
1778 struct ieee802154_pan_device *child;
1779 struct wpan_dev *wpan_dev;
1780 int err;
1781
1782 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1783 if (err)
1784 return err;
1785
1786 mutex_lock(&wpan_dev->association_lock);
1787
1788 if (cb->args[2])
1789 goto out;
1790
1791 if (wpan_dev->parent) {
1792 err = nl802154_send_peer_info(skb, cb, cb->nlh->nlmsg_seq,
1793 NLM_F_MULTI, rdev, wpan_dev,
1794 wpan_dev->parent,
1795 NL802154_PEER_TYPE_PARENT);
1796 if (err < 0)
1797 goto out_err;
1798 }
1799
1800 list_for_each_entry(child, &wpan_dev->children, node) {
1801 err = nl802154_send_peer_info(skb, cb, cb->nlh->nlmsg_seq,
1802 NLM_F_MULTI, rdev, wpan_dev,
1803 child,
1804 NL802154_PEER_TYPE_CHILD);
1805 if (err < 0)
1806 goto out_err;
1807 }
1808
1809 cb->args[2] = 1;
1810 out:
1811 err = skb->len;
1812 out_err:
1813 mutex_unlock(&wpan_dev->association_lock);
1814
1815 nl802154_finish_wpan_dev_dump(rdev);
1816
1817 return err;
1818 }
1819
1820 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
1821 static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
1822 [NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
1823 [NL802154_DEV_ADDR_ATTR_MODE] = { .type = NLA_U32 },
1824 [NL802154_DEV_ADDR_ATTR_SHORT] = { .type = NLA_U16 },
1825 [NL802154_DEV_ADDR_ATTR_EXTENDED] = { .type = NLA_U64 },
1826 };
1827
1828 static int
ieee802154_llsec_parse_dev_addr(struct nlattr * nla,struct ieee802154_addr * addr)1829 ieee802154_llsec_parse_dev_addr(struct nlattr *nla,
1830 struct ieee802154_addr *addr)
1831 {
1832 struct nlattr *attrs[NL802154_DEV_ADDR_ATTR_MAX + 1];
1833
1834 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_DEV_ADDR_ATTR_MAX, nla, nl802154_dev_addr_policy, NULL))
1835 return -EINVAL;
1836
1837 if (!attrs[NL802154_DEV_ADDR_ATTR_PAN_ID] || !attrs[NL802154_DEV_ADDR_ATTR_MODE])
1838 return -EINVAL;
1839
1840 addr->pan_id = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_PAN_ID]);
1841 addr->mode = nla_get_u32(attrs[NL802154_DEV_ADDR_ATTR_MODE]);
1842 switch (addr->mode) {
1843 case NL802154_DEV_ADDR_SHORT:
1844 if (!attrs[NL802154_DEV_ADDR_ATTR_SHORT])
1845 return -EINVAL;
1846 addr->short_addr = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_SHORT]);
1847 break;
1848 case NL802154_DEV_ADDR_EXTENDED:
1849 if (!attrs[NL802154_DEV_ADDR_ATTR_EXTENDED])
1850 return -EINVAL;
1851 addr->extended_addr = nla_get_le64(attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]);
1852 break;
1853 default:
1854 return -EINVAL;
1855 }
1856
1857 return 0;
1858 }
1859
1860 static const struct nla_policy nl802154_key_id_policy[NL802154_KEY_ID_ATTR_MAX + 1] = {
1861 [NL802154_KEY_ID_ATTR_MODE] = { .type = NLA_U32 },
1862 [NL802154_KEY_ID_ATTR_INDEX] = { .type = NLA_U8 },
1863 [NL802154_KEY_ID_ATTR_IMPLICIT] = { .type = NLA_NESTED },
1864 [NL802154_KEY_ID_ATTR_SOURCE_SHORT] = { .type = NLA_U32 },
1865 [NL802154_KEY_ID_ATTR_SOURCE_EXTENDED] = { .type = NLA_U64 },
1866 };
1867
1868 static int
ieee802154_llsec_parse_key_id(struct nlattr * nla,struct ieee802154_llsec_key_id * desc)1869 ieee802154_llsec_parse_key_id(struct nlattr *nla,
1870 struct ieee802154_llsec_key_id *desc)
1871 {
1872 struct nlattr *attrs[NL802154_KEY_ID_ATTR_MAX + 1];
1873
1874 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_KEY_ID_ATTR_MAX, nla, nl802154_key_id_policy, NULL))
1875 return -EINVAL;
1876
1877 if (!attrs[NL802154_KEY_ID_ATTR_MODE])
1878 return -EINVAL;
1879
1880 desc->mode = nla_get_u32(attrs[NL802154_KEY_ID_ATTR_MODE]);
1881 switch (desc->mode) {
1882 case NL802154_KEY_ID_MODE_IMPLICIT:
1883 if (!attrs[NL802154_KEY_ID_ATTR_IMPLICIT])
1884 return -EINVAL;
1885
1886 if (ieee802154_llsec_parse_dev_addr(attrs[NL802154_KEY_ID_ATTR_IMPLICIT],
1887 &desc->device_addr) < 0)
1888 return -EINVAL;
1889 break;
1890 case NL802154_KEY_ID_MODE_INDEX:
1891 break;
1892 case NL802154_KEY_ID_MODE_INDEX_SHORT:
1893 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT])
1894 return -EINVAL;
1895
1896 desc->short_source = nla_get_le32(attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT]);
1897 break;
1898 case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
1899 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED])
1900 return -EINVAL;
1901
1902 desc->extended_source = nla_get_le64(attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED]);
1903 break;
1904 default:
1905 return -EINVAL;
1906 }
1907
1908 if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
1909 if (!attrs[NL802154_KEY_ID_ATTR_INDEX])
1910 return -EINVAL;
1911
1912 /* TODO change id to idx */
1913 desc->id = nla_get_u8(attrs[NL802154_KEY_ID_ATTR_INDEX]);
1914 }
1915
1916 return 0;
1917 }
1918
nl802154_set_llsec_params(struct sk_buff * skb,struct genl_info * info)1919 static int nl802154_set_llsec_params(struct sk_buff *skb,
1920 struct genl_info *info)
1921 {
1922 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1923 struct net_device *dev = info->user_ptr[1];
1924 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1925 struct ieee802154_llsec_params params;
1926 u32 changed = 0;
1927 int ret;
1928
1929 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1930 return -EOPNOTSUPP;
1931
1932 if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
1933 u8 enabled;
1934
1935 enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1936 if (enabled != 0 && enabled != 1)
1937 return -EINVAL;
1938
1939 params.enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1940 changed |= IEEE802154_LLSEC_PARAM_ENABLED;
1941 }
1942
1943 if (info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID]) {
1944 ret = ieee802154_llsec_parse_key_id(info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID],
1945 ¶ms.out_key);
1946 if (ret < 0)
1947 return ret;
1948
1949 changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
1950 }
1951
1952 if (info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]) {
1953 params.out_level = nla_get_u32(info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]);
1954 if (params.out_level > NL802154_SECLEVEL_MAX)
1955 return -EINVAL;
1956
1957 changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
1958 }
1959
1960 if (info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]) {
1961 params.frame_counter = nla_get_be32(info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]);
1962 changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
1963 }
1964
1965 return rdev_set_llsec_params(rdev, wpan_dev, ¶ms, changed);
1966 }
1967
nl802154_send_key(struct sk_buff * msg,u32 cmd,u32 portid,u32 seq,int flags,struct cfg802154_registered_device * rdev,struct net_device * dev,const struct ieee802154_llsec_key_entry * key)1968 static int nl802154_send_key(struct sk_buff *msg, u32 cmd, u32 portid,
1969 u32 seq, int flags,
1970 struct cfg802154_registered_device *rdev,
1971 struct net_device *dev,
1972 const struct ieee802154_llsec_key_entry *key)
1973 {
1974 void *hdr;
1975 u32 commands[NL802154_CMD_FRAME_NR_IDS / 32];
1976 struct nlattr *nl_key, *nl_key_id;
1977
1978 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1979 if (!hdr)
1980 return -ENOBUFS;
1981
1982 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1983 goto nla_put_failure;
1984
1985 nl_key = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_KEY);
1986 if (!nl_key)
1987 goto nla_put_failure;
1988
1989 nl_key_id = nla_nest_start_noflag(msg, NL802154_KEY_ATTR_ID);
1990 if (!nl_key_id)
1991 goto nla_put_failure;
1992
1993 if (ieee802154_llsec_send_key_id(msg, &key->id) < 0)
1994 goto nla_put_failure;
1995
1996 nla_nest_end(msg, nl_key_id);
1997
1998 if (nla_put_u8(msg, NL802154_KEY_ATTR_USAGE_FRAMES,
1999 key->key->frame_types))
2000 goto nla_put_failure;
2001
2002 if (key->key->frame_types & BIT(NL802154_FRAME_CMD)) {
2003 /* TODO for each nested */
2004 memset(commands, 0, sizeof(commands));
2005 commands[7] = key->key->cmd_frame_ids;
2006 if (nla_put(msg, NL802154_KEY_ATTR_USAGE_CMDS,
2007 sizeof(commands), commands))
2008 goto nla_put_failure;
2009 }
2010
2011 if (nla_put(msg, NL802154_KEY_ATTR_BYTES, NL802154_KEY_SIZE,
2012 key->key->key))
2013 goto nla_put_failure;
2014
2015 nla_nest_end(msg, nl_key);
2016 genlmsg_end(msg, hdr);
2017
2018 return 0;
2019
2020 nla_put_failure:
2021 genlmsg_cancel(msg, hdr);
2022 return -EMSGSIZE;
2023 }
2024
2025 static int
nl802154_dump_llsec_key(struct sk_buff * skb,struct netlink_callback * cb)2026 nl802154_dump_llsec_key(struct sk_buff *skb, struct netlink_callback *cb)
2027 {
2028 struct cfg802154_registered_device *rdev = NULL;
2029 struct ieee802154_llsec_key_entry *key;
2030 struct ieee802154_llsec_table *table;
2031 struct wpan_dev *wpan_dev;
2032 int err;
2033
2034 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
2035 if (err)
2036 return err;
2037
2038 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
2039 err = skb->len;
2040 goto out_err;
2041 }
2042
2043 if (!wpan_dev->netdev) {
2044 err = -EINVAL;
2045 goto out_err;
2046 }
2047
2048 rdev_lock_llsec_table(rdev, wpan_dev);
2049 rdev_get_llsec_table(rdev, wpan_dev, &table);
2050
2051 /* TODO make it like station dump */
2052 if (cb->args[2])
2053 goto out;
2054
2055 list_for_each_entry(key, &table->keys, list) {
2056 if (nl802154_send_key(skb, NL802154_CMD_NEW_SEC_KEY,
2057 NETLINK_CB(cb->skb).portid,
2058 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2059 rdev, wpan_dev->netdev, key) < 0) {
2060 /* TODO */
2061 err = -EIO;
2062 rdev_unlock_llsec_table(rdev, wpan_dev);
2063 goto out_err;
2064 }
2065 }
2066
2067 cb->args[2] = 1;
2068
2069 out:
2070 rdev_unlock_llsec_table(rdev, wpan_dev);
2071 err = skb->len;
2072 out_err:
2073 nl802154_finish_wpan_dev_dump(rdev);
2074
2075 return err;
2076 }
2077
2078 static const struct nla_policy nl802154_key_policy[NL802154_KEY_ATTR_MAX + 1] = {
2079 [NL802154_KEY_ATTR_ID] = { NLA_NESTED },
2080 /* TODO handle it as for_each_nested and NLA_FLAG? */
2081 [NL802154_KEY_ATTR_USAGE_FRAMES] = { NLA_U8 },
2082 /* TODO handle it as for_each_nested, not static array? */
2083 [NL802154_KEY_ATTR_USAGE_CMDS] = { .len = NL802154_CMD_FRAME_NR_IDS / 8 },
2084 [NL802154_KEY_ATTR_BYTES] = { .len = NL802154_KEY_SIZE },
2085 };
2086
nl802154_add_llsec_key(struct sk_buff * skb,struct genl_info * info)2087 static int nl802154_add_llsec_key(struct sk_buff *skb, struct genl_info *info)
2088 {
2089 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2090 struct net_device *dev = info->user_ptr[1];
2091 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2092 struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
2093 struct ieee802154_llsec_key key = { };
2094 struct ieee802154_llsec_key_id id = { };
2095 u32 commands[NL802154_CMD_FRAME_NR_IDS / 32] = { };
2096
2097 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2098 return -EOPNOTSUPP;
2099
2100 if (!info->attrs[NL802154_ATTR_SEC_KEY] ||
2101 nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack))
2102 return -EINVAL;
2103
2104 if (!attrs[NL802154_KEY_ATTR_USAGE_FRAMES] ||
2105 !attrs[NL802154_KEY_ATTR_BYTES])
2106 return -EINVAL;
2107
2108 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
2109 return -ENOBUFS;
2110
2111 key.frame_types = nla_get_u8(attrs[NL802154_KEY_ATTR_USAGE_FRAMES]);
2112 if (key.frame_types > BIT(NL802154_FRAME_MAX) ||
2113 ((key.frame_types & BIT(NL802154_FRAME_CMD)) &&
2114 !attrs[NL802154_KEY_ATTR_USAGE_CMDS]))
2115 return -EINVAL;
2116
2117 if (attrs[NL802154_KEY_ATTR_USAGE_CMDS]) {
2118 /* TODO for each nested */
2119 nla_memcpy(commands, attrs[NL802154_KEY_ATTR_USAGE_CMDS],
2120 NL802154_CMD_FRAME_NR_IDS / 8);
2121
2122 /* TODO understand the -EINVAL logic here? last condition */
2123 if (commands[0] || commands[1] || commands[2] || commands[3] ||
2124 commands[4] || commands[5] || commands[6] ||
2125 commands[7] > BIT(NL802154_CMD_FRAME_MAX))
2126 return -EINVAL;
2127
2128 key.cmd_frame_ids = commands[7];
2129 } else {
2130 key.cmd_frame_ids = 0;
2131 }
2132
2133 nla_memcpy(key.key, attrs[NL802154_KEY_ATTR_BYTES], NL802154_KEY_SIZE);
2134
2135 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
2136 return -ENOBUFS;
2137
2138 return rdev_add_llsec_key(rdev, wpan_dev, &id, &key);
2139 }
2140
nl802154_del_llsec_key(struct sk_buff * skb,struct genl_info * info)2141 static int nl802154_del_llsec_key(struct sk_buff *skb, struct genl_info *info)
2142 {
2143 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2144 struct net_device *dev = info->user_ptr[1];
2145 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2146 struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
2147 struct ieee802154_llsec_key_id id;
2148
2149 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2150 return -EOPNOTSUPP;
2151
2152 if (!info->attrs[NL802154_ATTR_SEC_KEY] ||
2153 nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack))
2154 return -EINVAL;
2155
2156 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
2157 return -ENOBUFS;
2158
2159 return rdev_del_llsec_key(rdev, wpan_dev, &id);
2160 }
2161
nl802154_send_device(struct sk_buff * msg,u32 cmd,u32 portid,u32 seq,int flags,struct cfg802154_registered_device * rdev,struct net_device * dev,const struct ieee802154_llsec_device * dev_desc)2162 static int nl802154_send_device(struct sk_buff *msg, u32 cmd, u32 portid,
2163 u32 seq, int flags,
2164 struct cfg802154_registered_device *rdev,
2165 struct net_device *dev,
2166 const struct ieee802154_llsec_device *dev_desc)
2167 {
2168 void *hdr;
2169 struct nlattr *nl_device;
2170
2171 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
2172 if (!hdr)
2173 return -ENOBUFS;
2174
2175 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
2176 goto nla_put_failure;
2177
2178 nl_device = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_DEVICE);
2179 if (!nl_device)
2180 goto nla_put_failure;
2181
2182 if (nla_put_u32(msg, NL802154_DEV_ATTR_FRAME_COUNTER,
2183 dev_desc->frame_counter) ||
2184 nla_put_le16(msg, NL802154_DEV_ATTR_PAN_ID, dev_desc->pan_id) ||
2185 nla_put_le16(msg, NL802154_DEV_ATTR_SHORT_ADDR,
2186 dev_desc->short_addr) ||
2187 nla_put_le64(msg, NL802154_DEV_ATTR_EXTENDED_ADDR,
2188 dev_desc->hwaddr, NL802154_DEV_ATTR_PAD) ||
2189 nla_put_u8(msg, NL802154_DEV_ATTR_SECLEVEL_EXEMPT,
2190 dev_desc->seclevel_exempt) ||
2191 nla_put_u32(msg, NL802154_DEV_ATTR_KEY_MODE, dev_desc->key_mode))
2192 goto nla_put_failure;
2193
2194 nla_nest_end(msg, nl_device);
2195 genlmsg_end(msg, hdr);
2196
2197 return 0;
2198
2199 nla_put_failure:
2200 genlmsg_cancel(msg, hdr);
2201 return -EMSGSIZE;
2202 }
2203
2204 static int
nl802154_dump_llsec_dev(struct sk_buff * skb,struct netlink_callback * cb)2205 nl802154_dump_llsec_dev(struct sk_buff *skb, struct netlink_callback *cb)
2206 {
2207 struct cfg802154_registered_device *rdev = NULL;
2208 struct ieee802154_llsec_device *dev;
2209 struct ieee802154_llsec_table *table;
2210 struct wpan_dev *wpan_dev;
2211 int err;
2212
2213 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
2214 if (err)
2215 return err;
2216
2217 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
2218 err = skb->len;
2219 goto out_err;
2220 }
2221
2222 if (!wpan_dev->netdev) {
2223 err = -EINVAL;
2224 goto out_err;
2225 }
2226
2227 rdev_lock_llsec_table(rdev, wpan_dev);
2228 rdev_get_llsec_table(rdev, wpan_dev, &table);
2229
2230 /* TODO make it like station dump */
2231 if (cb->args[2])
2232 goto out;
2233
2234 list_for_each_entry(dev, &table->devices, list) {
2235 if (nl802154_send_device(skb, NL802154_CMD_NEW_SEC_LEVEL,
2236 NETLINK_CB(cb->skb).portid,
2237 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2238 rdev, wpan_dev->netdev, dev) < 0) {
2239 /* TODO */
2240 err = -EIO;
2241 rdev_unlock_llsec_table(rdev, wpan_dev);
2242 goto out_err;
2243 }
2244 }
2245
2246 cb->args[2] = 1;
2247
2248 out:
2249 rdev_unlock_llsec_table(rdev, wpan_dev);
2250 err = skb->len;
2251 out_err:
2252 nl802154_finish_wpan_dev_dump(rdev);
2253
2254 return err;
2255 }
2256
2257 static const struct nla_policy nl802154_dev_policy[NL802154_DEV_ATTR_MAX + 1] = {
2258 [NL802154_DEV_ATTR_FRAME_COUNTER] = { NLA_U32 },
2259 [NL802154_DEV_ATTR_PAN_ID] = { .type = NLA_U16 },
2260 [NL802154_DEV_ATTR_SHORT_ADDR] = { .type = NLA_U16 },
2261 [NL802154_DEV_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
2262 [NL802154_DEV_ATTR_SECLEVEL_EXEMPT] = { NLA_U8 },
2263 [NL802154_DEV_ATTR_KEY_MODE] = { NLA_U32 },
2264 };
2265
2266 static int
ieee802154_llsec_parse_device(struct nlattr * nla,struct ieee802154_llsec_device * dev)2267 ieee802154_llsec_parse_device(struct nlattr *nla,
2268 struct ieee802154_llsec_device *dev)
2269 {
2270 struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
2271
2272 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, nla, nl802154_dev_policy, NULL))
2273 return -EINVAL;
2274
2275 memset(dev, 0, sizeof(*dev));
2276
2277 if (!attrs[NL802154_DEV_ATTR_FRAME_COUNTER] ||
2278 !attrs[NL802154_DEV_ATTR_PAN_ID] ||
2279 !attrs[NL802154_DEV_ATTR_SHORT_ADDR] ||
2280 !attrs[NL802154_DEV_ATTR_EXTENDED_ADDR] ||
2281 !attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT] ||
2282 !attrs[NL802154_DEV_ATTR_KEY_MODE])
2283 return -EINVAL;
2284
2285 /* TODO be32 */
2286 dev->frame_counter = nla_get_u32(attrs[NL802154_DEV_ATTR_FRAME_COUNTER]);
2287 dev->pan_id = nla_get_le16(attrs[NL802154_DEV_ATTR_PAN_ID]);
2288 dev->short_addr = nla_get_le16(attrs[NL802154_DEV_ATTR_SHORT_ADDR]);
2289 /* TODO rename hwaddr to extended_addr */
2290 dev->hwaddr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
2291 dev->seclevel_exempt = nla_get_u8(attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT]);
2292 dev->key_mode = nla_get_u32(attrs[NL802154_DEV_ATTR_KEY_MODE]);
2293
2294 if (dev->key_mode > NL802154_DEVKEY_MAX ||
2295 (dev->seclevel_exempt != 0 && dev->seclevel_exempt != 1))
2296 return -EINVAL;
2297
2298 return 0;
2299 }
2300
nl802154_add_llsec_dev(struct sk_buff * skb,struct genl_info * info)2301 static int nl802154_add_llsec_dev(struct sk_buff *skb, struct genl_info *info)
2302 {
2303 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2304 struct net_device *dev = info->user_ptr[1];
2305 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2306 struct ieee802154_llsec_device dev_desc;
2307
2308 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2309 return -EOPNOTSUPP;
2310
2311 if (ieee802154_llsec_parse_device(info->attrs[NL802154_ATTR_SEC_DEVICE],
2312 &dev_desc) < 0)
2313 return -EINVAL;
2314
2315 return rdev_add_device(rdev, wpan_dev, &dev_desc);
2316 }
2317
nl802154_del_llsec_dev(struct sk_buff * skb,struct genl_info * info)2318 static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info)
2319 {
2320 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2321 struct net_device *dev = info->user_ptr[1];
2322 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2323 struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
2324 __le64 extended_addr;
2325
2326 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2327 return -EOPNOTSUPP;
2328
2329 if (!info->attrs[NL802154_ATTR_SEC_DEVICE] ||
2330 nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack))
2331 return -EINVAL;
2332
2333 if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR])
2334 return -EINVAL;
2335
2336 extended_addr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
2337 return rdev_del_device(rdev, wpan_dev, extended_addr);
2338 }
2339
nl802154_send_devkey(struct sk_buff * msg,u32 cmd,u32 portid,u32 seq,int flags,struct cfg802154_registered_device * rdev,struct net_device * dev,__le64 extended_addr,const struct ieee802154_llsec_device_key * devkey)2340 static int nl802154_send_devkey(struct sk_buff *msg, u32 cmd, u32 portid,
2341 u32 seq, int flags,
2342 struct cfg802154_registered_device *rdev,
2343 struct net_device *dev, __le64 extended_addr,
2344 const struct ieee802154_llsec_device_key *devkey)
2345 {
2346 void *hdr;
2347 struct nlattr *nl_devkey, *nl_key_id;
2348
2349 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
2350 if (!hdr)
2351 return -ENOBUFS;
2352
2353 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
2354 goto nla_put_failure;
2355
2356 nl_devkey = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_DEVKEY);
2357 if (!nl_devkey)
2358 goto nla_put_failure;
2359
2360 if (nla_put_le64(msg, NL802154_DEVKEY_ATTR_EXTENDED_ADDR,
2361 extended_addr, NL802154_DEVKEY_ATTR_PAD) ||
2362 nla_put_u32(msg, NL802154_DEVKEY_ATTR_FRAME_COUNTER,
2363 devkey->frame_counter))
2364 goto nla_put_failure;
2365
2366 nl_key_id = nla_nest_start_noflag(msg, NL802154_DEVKEY_ATTR_ID);
2367 if (!nl_key_id)
2368 goto nla_put_failure;
2369
2370 if (ieee802154_llsec_send_key_id(msg, &devkey->key_id) < 0)
2371 goto nla_put_failure;
2372
2373 nla_nest_end(msg, nl_key_id);
2374 nla_nest_end(msg, nl_devkey);
2375 genlmsg_end(msg, hdr);
2376
2377 return 0;
2378
2379 nla_put_failure:
2380 genlmsg_cancel(msg, hdr);
2381 return -EMSGSIZE;
2382 }
2383
2384 static int
nl802154_dump_llsec_devkey(struct sk_buff * skb,struct netlink_callback * cb)2385 nl802154_dump_llsec_devkey(struct sk_buff *skb, struct netlink_callback *cb)
2386 {
2387 struct cfg802154_registered_device *rdev = NULL;
2388 struct ieee802154_llsec_device_key *kpos;
2389 struct ieee802154_llsec_device *dpos;
2390 struct ieee802154_llsec_table *table;
2391 struct wpan_dev *wpan_dev;
2392 int err;
2393
2394 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
2395 if (err)
2396 return err;
2397
2398 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
2399 err = skb->len;
2400 goto out_err;
2401 }
2402
2403 if (!wpan_dev->netdev) {
2404 err = -EINVAL;
2405 goto out_err;
2406 }
2407
2408 rdev_lock_llsec_table(rdev, wpan_dev);
2409 rdev_get_llsec_table(rdev, wpan_dev, &table);
2410
2411 /* TODO make it like station dump */
2412 if (cb->args[2])
2413 goto out;
2414
2415 /* TODO look if remove devkey and do some nested attribute */
2416 list_for_each_entry(dpos, &table->devices, list) {
2417 list_for_each_entry(kpos, &dpos->keys, list) {
2418 if (nl802154_send_devkey(skb,
2419 NL802154_CMD_NEW_SEC_LEVEL,
2420 NETLINK_CB(cb->skb).portid,
2421 cb->nlh->nlmsg_seq,
2422 NLM_F_MULTI, rdev,
2423 wpan_dev->netdev,
2424 dpos->hwaddr,
2425 kpos) < 0) {
2426 /* TODO */
2427 err = -EIO;
2428 rdev_unlock_llsec_table(rdev, wpan_dev);
2429 goto out_err;
2430 }
2431 }
2432 }
2433
2434 cb->args[2] = 1;
2435
2436 out:
2437 rdev_unlock_llsec_table(rdev, wpan_dev);
2438 err = skb->len;
2439 out_err:
2440 nl802154_finish_wpan_dev_dump(rdev);
2441
2442 return err;
2443 }
2444
2445 static const struct nla_policy nl802154_devkey_policy[NL802154_DEVKEY_ATTR_MAX + 1] = {
2446 [NL802154_DEVKEY_ATTR_FRAME_COUNTER] = { NLA_U32 },
2447 [NL802154_DEVKEY_ATTR_EXTENDED_ADDR] = { NLA_U64 },
2448 [NL802154_DEVKEY_ATTR_ID] = { NLA_NESTED },
2449 };
2450
nl802154_add_llsec_devkey(struct sk_buff * skb,struct genl_info * info)2451 static int nl802154_add_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
2452 {
2453 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2454 struct net_device *dev = info->user_ptr[1];
2455 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2456 struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
2457 struct ieee802154_llsec_device_key key;
2458 __le64 extended_addr;
2459
2460 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2461 return -EOPNOTSUPP;
2462
2463 if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
2464 nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack) < 0)
2465 return -EINVAL;
2466
2467 if (!attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER] ||
2468 !attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
2469 return -EINVAL;
2470
2471 /* TODO change key.id ? */
2472 if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
2473 &key.key_id) < 0)
2474 return -ENOBUFS;
2475
2476 /* TODO be32 */
2477 key.frame_counter = nla_get_u32(attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER]);
2478 /* TODO change naming hwaddr -> extended_addr
2479 * check unique identifier short+pan OR extended_addr
2480 */
2481 extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
2482 return rdev_add_devkey(rdev, wpan_dev, extended_addr, &key);
2483 }
2484
nl802154_del_llsec_devkey(struct sk_buff * skb,struct genl_info * info)2485 static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
2486 {
2487 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2488 struct net_device *dev = info->user_ptr[1];
2489 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2490 struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
2491 struct ieee802154_llsec_device_key key;
2492 __le64 extended_addr;
2493
2494 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2495 return -EOPNOTSUPP;
2496
2497 if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
2498 nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack))
2499 return -EINVAL;
2500
2501 if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
2502 return -EINVAL;
2503
2504 /* TODO change key.id ? */
2505 if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
2506 &key.key_id) < 0)
2507 return -ENOBUFS;
2508
2509 /* TODO change naming hwaddr -> extended_addr
2510 * check unique identifier short+pan OR extended_addr
2511 */
2512 extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
2513 return rdev_del_devkey(rdev, wpan_dev, extended_addr, &key);
2514 }
2515
nl802154_send_seclevel(struct sk_buff * msg,u32 cmd,u32 portid,u32 seq,int flags,struct cfg802154_registered_device * rdev,struct net_device * dev,const struct ieee802154_llsec_seclevel * sl)2516 static int nl802154_send_seclevel(struct sk_buff *msg, u32 cmd, u32 portid,
2517 u32 seq, int flags,
2518 struct cfg802154_registered_device *rdev,
2519 struct net_device *dev,
2520 const struct ieee802154_llsec_seclevel *sl)
2521 {
2522 void *hdr;
2523 struct nlattr *nl_seclevel;
2524
2525 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
2526 if (!hdr)
2527 return -ENOBUFS;
2528
2529 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
2530 goto nla_put_failure;
2531
2532 nl_seclevel = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_LEVEL);
2533 if (!nl_seclevel)
2534 goto nla_put_failure;
2535
2536 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_FRAME, sl->frame_type) ||
2537 nla_put_u32(msg, NL802154_SECLEVEL_ATTR_LEVELS, sl->sec_levels) ||
2538 nla_put_u8(msg, NL802154_SECLEVEL_ATTR_DEV_OVERRIDE,
2539 sl->device_override))
2540 goto nla_put_failure;
2541
2542 if (sl->frame_type == NL802154_FRAME_CMD) {
2543 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_CMD_FRAME,
2544 sl->cmd_frame_id))
2545 goto nla_put_failure;
2546 }
2547
2548 nla_nest_end(msg, nl_seclevel);
2549 genlmsg_end(msg, hdr);
2550
2551 return 0;
2552
2553 nla_put_failure:
2554 genlmsg_cancel(msg, hdr);
2555 return -EMSGSIZE;
2556 }
2557
2558 static int
nl802154_dump_llsec_seclevel(struct sk_buff * skb,struct netlink_callback * cb)2559 nl802154_dump_llsec_seclevel(struct sk_buff *skb, struct netlink_callback *cb)
2560 {
2561 struct cfg802154_registered_device *rdev = NULL;
2562 struct ieee802154_llsec_seclevel *sl;
2563 struct ieee802154_llsec_table *table;
2564 struct wpan_dev *wpan_dev;
2565 int err;
2566
2567 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
2568 if (err)
2569 return err;
2570
2571 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
2572 err = skb->len;
2573 goto out_err;
2574 }
2575
2576 if (!wpan_dev->netdev) {
2577 err = -EINVAL;
2578 goto out_err;
2579 }
2580
2581 rdev_lock_llsec_table(rdev, wpan_dev);
2582 rdev_get_llsec_table(rdev, wpan_dev, &table);
2583
2584 /* TODO make it like station dump */
2585 if (cb->args[2])
2586 goto out;
2587
2588 list_for_each_entry(sl, &table->security_levels, list) {
2589 if (nl802154_send_seclevel(skb, NL802154_CMD_NEW_SEC_LEVEL,
2590 NETLINK_CB(cb->skb).portid,
2591 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2592 rdev, wpan_dev->netdev, sl) < 0) {
2593 /* TODO */
2594 err = -EIO;
2595 rdev_unlock_llsec_table(rdev, wpan_dev);
2596 goto out_err;
2597 }
2598 }
2599
2600 cb->args[2] = 1;
2601
2602 out:
2603 rdev_unlock_llsec_table(rdev, wpan_dev);
2604 err = skb->len;
2605 out_err:
2606 nl802154_finish_wpan_dev_dump(rdev);
2607
2608 return err;
2609 }
2610
2611 static const struct nla_policy nl802154_seclevel_policy[NL802154_SECLEVEL_ATTR_MAX + 1] = {
2612 [NL802154_SECLEVEL_ATTR_LEVELS] = { .type = NLA_U8 },
2613 [NL802154_SECLEVEL_ATTR_FRAME] = { .type = NLA_U32 },
2614 [NL802154_SECLEVEL_ATTR_CMD_FRAME] = { .type = NLA_U32 },
2615 [NL802154_SECLEVEL_ATTR_DEV_OVERRIDE] = { .type = NLA_U8 },
2616 };
2617
2618 static int
llsec_parse_seclevel(struct nlattr * nla,struct ieee802154_llsec_seclevel * sl)2619 llsec_parse_seclevel(struct nlattr *nla, struct ieee802154_llsec_seclevel *sl)
2620 {
2621 struct nlattr *attrs[NL802154_SECLEVEL_ATTR_MAX + 1];
2622
2623 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_SECLEVEL_ATTR_MAX, nla, nl802154_seclevel_policy, NULL))
2624 return -EINVAL;
2625
2626 memset(sl, 0, sizeof(*sl));
2627
2628 if (!attrs[NL802154_SECLEVEL_ATTR_LEVELS] ||
2629 !attrs[NL802154_SECLEVEL_ATTR_FRAME] ||
2630 !attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE])
2631 return -EINVAL;
2632
2633 sl->sec_levels = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_LEVELS]);
2634 sl->frame_type = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_FRAME]);
2635 sl->device_override = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE]);
2636 if (sl->frame_type > NL802154_FRAME_MAX ||
2637 (sl->device_override != 0 && sl->device_override != 1))
2638 return -EINVAL;
2639
2640 if (sl->frame_type == NL802154_FRAME_CMD) {
2641 if (!attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME])
2642 return -EINVAL;
2643
2644 sl->cmd_frame_id = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME]);
2645 if (sl->cmd_frame_id > NL802154_CMD_FRAME_MAX)
2646 return -EINVAL;
2647 }
2648
2649 return 0;
2650 }
2651
nl802154_add_llsec_seclevel(struct sk_buff * skb,struct genl_info * info)2652 static int nl802154_add_llsec_seclevel(struct sk_buff *skb,
2653 struct genl_info *info)
2654 {
2655 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2656 struct net_device *dev = info->user_ptr[1];
2657 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2658 struct ieee802154_llsec_seclevel sl;
2659
2660 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2661 return -EOPNOTSUPP;
2662
2663 if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2664 &sl) < 0)
2665 return -EINVAL;
2666
2667 return rdev_add_seclevel(rdev, wpan_dev, &sl);
2668 }
2669
nl802154_del_llsec_seclevel(struct sk_buff * skb,struct genl_info * info)2670 static int nl802154_del_llsec_seclevel(struct sk_buff *skb,
2671 struct genl_info *info)
2672 {
2673 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2674 struct net_device *dev = info->user_ptr[1];
2675 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2676 struct ieee802154_llsec_seclevel sl;
2677
2678 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2679 return -EOPNOTSUPP;
2680
2681 if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2682 &sl) < 0)
2683 return -EINVAL;
2684
2685 return rdev_del_seclevel(rdev, wpan_dev, &sl);
2686 }
2687 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2688
2689 #define NL802154_FLAG_NEED_WPAN_PHY 0x01
2690 #define NL802154_FLAG_NEED_NETDEV 0x02
2691 #define NL802154_FLAG_NEED_RTNL 0x04
2692 #define NL802154_FLAG_CHECK_NETDEV_UP 0x08
2693 #define NL802154_FLAG_NEED_WPAN_DEV 0x10
2694
nl802154_pre_doit(const struct genl_split_ops * ops,struct sk_buff * skb,struct genl_info * info)2695 static int nl802154_pre_doit(const struct genl_split_ops *ops,
2696 struct sk_buff *skb,
2697 struct genl_info *info)
2698 {
2699 struct cfg802154_registered_device *rdev;
2700 struct wpan_dev *wpan_dev;
2701 struct net_device *dev;
2702 bool rtnl = ops->internal_flags & NL802154_FLAG_NEED_RTNL;
2703
2704 if (rtnl)
2705 rtnl_lock();
2706
2707 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_PHY) {
2708 rdev = cfg802154_get_dev_from_info(genl_info_net(info), info);
2709 if (IS_ERR(rdev)) {
2710 if (rtnl)
2711 rtnl_unlock();
2712 return PTR_ERR(rdev);
2713 }
2714 info->user_ptr[0] = rdev;
2715 } else if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV ||
2716 ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2717 ASSERT_RTNL();
2718 wpan_dev = __cfg802154_wpan_dev_from_attrs(genl_info_net(info),
2719 info->attrs);
2720 if (IS_ERR(wpan_dev)) {
2721 if (rtnl)
2722 rtnl_unlock();
2723 return PTR_ERR(wpan_dev);
2724 }
2725
2726 dev = wpan_dev->netdev;
2727 rdev = wpan_phy_to_rdev(wpan_dev->wpan_phy);
2728
2729 if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV) {
2730 if (!dev) {
2731 if (rtnl)
2732 rtnl_unlock();
2733 return -EINVAL;
2734 }
2735
2736 info->user_ptr[1] = dev;
2737 } else {
2738 info->user_ptr[1] = wpan_dev;
2739 }
2740
2741 if (dev) {
2742 if (ops->internal_flags & NL802154_FLAG_CHECK_NETDEV_UP &&
2743 !netif_running(dev)) {
2744 if (rtnl)
2745 rtnl_unlock();
2746 return -ENETDOWN;
2747 }
2748
2749 dev_hold(dev);
2750 }
2751
2752 info->user_ptr[0] = rdev;
2753 }
2754
2755 return 0;
2756 }
2757
nl802154_post_doit(const struct genl_split_ops * ops,struct sk_buff * skb,struct genl_info * info)2758 static void nl802154_post_doit(const struct genl_split_ops *ops,
2759 struct sk_buff *skb,
2760 struct genl_info *info)
2761 {
2762 if (info->user_ptr[1]) {
2763 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2764 struct wpan_dev *wpan_dev = info->user_ptr[1];
2765
2766 dev_put(wpan_dev->netdev);
2767 } else {
2768 dev_put(info->user_ptr[1]);
2769 }
2770 }
2771
2772 if (ops->internal_flags & NL802154_FLAG_NEED_RTNL)
2773 rtnl_unlock();
2774 }
2775
2776 static const struct genl_ops nl802154_ops[] = {
2777 {
2778 .cmd = NL802154_CMD_GET_WPAN_PHY,
2779 .validate = GENL_DONT_VALIDATE_STRICT |
2780 GENL_DONT_VALIDATE_DUMP_STRICT,
2781 .doit = nl802154_get_wpan_phy,
2782 .dumpit = nl802154_dump_wpan_phy,
2783 .done = nl802154_dump_wpan_phy_done,
2784 /* can be retrieved by unprivileged users */
2785 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2786 NL802154_FLAG_NEED_RTNL,
2787 },
2788 {
2789 .cmd = NL802154_CMD_GET_INTERFACE,
2790 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2791 .doit = nl802154_get_interface,
2792 .dumpit = nl802154_dump_interface,
2793 /* can be retrieved by unprivileged users */
2794 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2795 NL802154_FLAG_NEED_RTNL,
2796 },
2797 {
2798 .cmd = NL802154_CMD_NEW_INTERFACE,
2799 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2800 .doit = nl802154_new_interface,
2801 .flags = GENL_ADMIN_PERM,
2802 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2803 NL802154_FLAG_NEED_RTNL,
2804 },
2805 {
2806 .cmd = NL802154_CMD_DEL_INTERFACE,
2807 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2808 .doit = nl802154_del_interface,
2809 .flags = GENL_ADMIN_PERM,
2810 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2811 NL802154_FLAG_NEED_RTNL,
2812 },
2813 {
2814 .cmd = NL802154_CMD_SET_CHANNEL,
2815 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2816 .doit = nl802154_set_channel,
2817 .flags = GENL_ADMIN_PERM,
2818 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2819 NL802154_FLAG_NEED_RTNL,
2820 },
2821 {
2822 .cmd = NL802154_CMD_SET_CCA_MODE,
2823 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2824 .doit = nl802154_set_cca_mode,
2825 .flags = GENL_ADMIN_PERM,
2826 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2827 NL802154_FLAG_NEED_RTNL,
2828 },
2829 {
2830 .cmd = NL802154_CMD_SET_CCA_ED_LEVEL,
2831 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2832 .doit = nl802154_set_cca_ed_level,
2833 .flags = GENL_ADMIN_PERM,
2834 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2835 NL802154_FLAG_NEED_RTNL,
2836 },
2837 {
2838 .cmd = NL802154_CMD_SET_TX_POWER,
2839 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2840 .doit = nl802154_set_tx_power,
2841 .flags = GENL_ADMIN_PERM,
2842 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2843 NL802154_FLAG_NEED_RTNL,
2844 },
2845 {
2846 .cmd = NL802154_CMD_SET_WPAN_PHY_NETNS,
2847 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2848 .doit = nl802154_wpan_phy_netns,
2849 .flags = GENL_ADMIN_PERM,
2850 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2851 NL802154_FLAG_NEED_RTNL,
2852 },
2853 {
2854 .cmd = NL802154_CMD_SET_PAN_ID,
2855 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2856 .doit = nl802154_set_pan_id,
2857 .flags = GENL_ADMIN_PERM,
2858 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2859 NL802154_FLAG_NEED_RTNL,
2860 },
2861 {
2862 .cmd = NL802154_CMD_SET_SHORT_ADDR,
2863 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2864 .doit = nl802154_set_short_addr,
2865 .flags = GENL_ADMIN_PERM,
2866 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2867 NL802154_FLAG_NEED_RTNL,
2868 },
2869 {
2870 .cmd = NL802154_CMD_SET_BACKOFF_EXPONENT,
2871 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2872 .doit = nl802154_set_backoff_exponent,
2873 .flags = GENL_ADMIN_PERM,
2874 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2875 NL802154_FLAG_NEED_RTNL,
2876 },
2877 {
2878 .cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,
2879 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2880 .doit = nl802154_set_max_csma_backoffs,
2881 .flags = GENL_ADMIN_PERM,
2882 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2883 NL802154_FLAG_NEED_RTNL,
2884 },
2885 {
2886 .cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES,
2887 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2888 .doit = nl802154_set_max_frame_retries,
2889 .flags = GENL_ADMIN_PERM,
2890 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2891 NL802154_FLAG_NEED_RTNL,
2892 },
2893 {
2894 .cmd = NL802154_CMD_SET_LBT_MODE,
2895 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2896 .doit = nl802154_set_lbt_mode,
2897 .flags = GENL_ADMIN_PERM,
2898 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2899 NL802154_FLAG_NEED_RTNL,
2900 },
2901 {
2902 .cmd = NL802154_CMD_SET_ACKREQ_DEFAULT,
2903 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2904 .doit = nl802154_set_ackreq_default,
2905 .flags = GENL_ADMIN_PERM,
2906 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2907 NL802154_FLAG_NEED_RTNL,
2908 },
2909 {
2910 .cmd = NL802154_CMD_TRIGGER_SCAN,
2911 .doit = nl802154_trigger_scan,
2912 .flags = GENL_ADMIN_PERM,
2913 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2914 NL802154_FLAG_CHECK_NETDEV_UP |
2915 NL802154_FLAG_NEED_RTNL,
2916 },
2917 {
2918 .cmd = NL802154_CMD_ABORT_SCAN,
2919 .doit = nl802154_abort_scan,
2920 .flags = GENL_ADMIN_PERM,
2921 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2922 NL802154_FLAG_CHECK_NETDEV_UP |
2923 NL802154_FLAG_NEED_RTNL,
2924 },
2925 {
2926 .cmd = NL802154_CMD_SEND_BEACONS,
2927 .doit = nl802154_send_beacons,
2928 .flags = GENL_ADMIN_PERM,
2929 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2930 NL802154_FLAG_CHECK_NETDEV_UP |
2931 NL802154_FLAG_NEED_RTNL,
2932 },
2933 {
2934 .cmd = NL802154_CMD_STOP_BEACONS,
2935 .doit = nl802154_stop_beacons,
2936 .flags = GENL_ADMIN_PERM,
2937 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2938 NL802154_FLAG_CHECK_NETDEV_UP |
2939 NL802154_FLAG_NEED_RTNL,
2940 },
2941 {
2942 .cmd = NL802154_CMD_ASSOCIATE,
2943 .doit = nl802154_associate,
2944 .flags = GENL_ADMIN_PERM,
2945 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2946 NL802154_FLAG_CHECK_NETDEV_UP |
2947 NL802154_FLAG_NEED_RTNL,
2948 },
2949 {
2950 .cmd = NL802154_CMD_DISASSOCIATE,
2951 .doit = nl802154_disassociate,
2952 .flags = GENL_ADMIN_PERM,
2953 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2954 NL802154_FLAG_CHECK_NETDEV_UP |
2955 NL802154_FLAG_NEED_RTNL,
2956 },
2957 {
2958 .cmd = NL802154_CMD_SET_MAX_ASSOCIATIONS,
2959 .doit = nl802154_set_max_associations,
2960 .flags = GENL_ADMIN_PERM,
2961 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2962 NL802154_FLAG_NEED_RTNL,
2963 },
2964 {
2965 .cmd = NL802154_CMD_LIST_ASSOCIATIONS,
2966 .dumpit = nl802154_list_associations,
2967 /* can be retrieved by unprivileged users */
2968 },
2969 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
2970 {
2971 .cmd = NL802154_CMD_SET_SEC_PARAMS,
2972 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2973 .doit = nl802154_set_llsec_params,
2974 .flags = GENL_ADMIN_PERM,
2975 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2976 NL802154_FLAG_NEED_RTNL,
2977 },
2978 {
2979 .cmd = NL802154_CMD_GET_SEC_KEY,
2980 .validate = GENL_DONT_VALIDATE_STRICT |
2981 GENL_DONT_VALIDATE_DUMP_STRICT,
2982 /* TODO .doit by matching key id? */
2983 .dumpit = nl802154_dump_llsec_key,
2984 .flags = GENL_ADMIN_PERM,
2985 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2986 NL802154_FLAG_NEED_RTNL,
2987 },
2988 {
2989 .cmd = NL802154_CMD_NEW_SEC_KEY,
2990 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2991 .doit = nl802154_add_llsec_key,
2992 .flags = GENL_ADMIN_PERM,
2993 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2994 NL802154_FLAG_NEED_RTNL,
2995 },
2996 {
2997 .cmd = NL802154_CMD_DEL_SEC_KEY,
2998 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2999 .doit = nl802154_del_llsec_key,
3000 .flags = GENL_ADMIN_PERM,
3001 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3002 NL802154_FLAG_NEED_RTNL,
3003 },
3004 /* TODO unique identifier must short+pan OR extended_addr */
3005 {
3006 .cmd = NL802154_CMD_GET_SEC_DEV,
3007 .validate = GENL_DONT_VALIDATE_STRICT |
3008 GENL_DONT_VALIDATE_DUMP_STRICT,
3009 /* TODO .doit by matching extended_addr? */
3010 .dumpit = nl802154_dump_llsec_dev,
3011 .flags = GENL_ADMIN_PERM,
3012 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3013 NL802154_FLAG_NEED_RTNL,
3014 },
3015 {
3016 .cmd = NL802154_CMD_NEW_SEC_DEV,
3017 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3018 .doit = nl802154_add_llsec_dev,
3019 .flags = GENL_ADMIN_PERM,
3020 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3021 NL802154_FLAG_NEED_RTNL,
3022 },
3023 {
3024 .cmd = NL802154_CMD_DEL_SEC_DEV,
3025 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3026 .doit = nl802154_del_llsec_dev,
3027 .flags = GENL_ADMIN_PERM,
3028 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3029 NL802154_FLAG_NEED_RTNL,
3030 },
3031 /* TODO remove complete devkey, put it as nested? */
3032 {
3033 .cmd = NL802154_CMD_GET_SEC_DEVKEY,
3034 .validate = GENL_DONT_VALIDATE_STRICT |
3035 GENL_DONT_VALIDATE_DUMP_STRICT,
3036 /* TODO doit by matching ??? */
3037 .dumpit = nl802154_dump_llsec_devkey,
3038 .flags = GENL_ADMIN_PERM,
3039 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3040 NL802154_FLAG_NEED_RTNL,
3041 },
3042 {
3043 .cmd = NL802154_CMD_NEW_SEC_DEVKEY,
3044 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3045 .doit = nl802154_add_llsec_devkey,
3046 .flags = GENL_ADMIN_PERM,
3047 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3048 NL802154_FLAG_NEED_RTNL,
3049 },
3050 {
3051 .cmd = NL802154_CMD_DEL_SEC_DEVKEY,
3052 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3053 .doit = nl802154_del_llsec_devkey,
3054 .flags = GENL_ADMIN_PERM,
3055 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3056 NL802154_FLAG_NEED_RTNL,
3057 },
3058 {
3059 .cmd = NL802154_CMD_GET_SEC_LEVEL,
3060 .validate = GENL_DONT_VALIDATE_STRICT |
3061 GENL_DONT_VALIDATE_DUMP_STRICT,
3062 /* TODO .doit by matching frame_type? */
3063 .dumpit = nl802154_dump_llsec_seclevel,
3064 .flags = GENL_ADMIN_PERM,
3065 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3066 NL802154_FLAG_NEED_RTNL,
3067 },
3068 {
3069 .cmd = NL802154_CMD_NEW_SEC_LEVEL,
3070 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3071 .doit = nl802154_add_llsec_seclevel,
3072 .flags = GENL_ADMIN_PERM,
3073 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3074 NL802154_FLAG_NEED_RTNL,
3075 },
3076 {
3077 .cmd = NL802154_CMD_DEL_SEC_LEVEL,
3078 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
3079 /* TODO match frame_type only? */
3080 .doit = nl802154_del_llsec_seclevel,
3081 .flags = GENL_ADMIN_PERM,
3082 .internal_flags = NL802154_FLAG_NEED_NETDEV |
3083 NL802154_FLAG_NEED_RTNL,
3084 },
3085 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
3086 };
3087
3088 static struct genl_family nl802154_fam __ro_after_init = {
3089 .name = NL802154_GENL_NAME, /* have users key off the name instead */
3090 .hdrsize = 0, /* no private header */
3091 .version = 1, /* no particular meaning now */
3092 .maxattr = NL802154_ATTR_MAX,
3093 .policy = nl802154_policy,
3094 .netnsok = true,
3095 .pre_doit = nl802154_pre_doit,
3096 .post_doit = nl802154_post_doit,
3097 .module = THIS_MODULE,
3098 .ops = nl802154_ops,
3099 .n_ops = ARRAY_SIZE(nl802154_ops),
3100 .resv_start_op = NL802154_CMD_DEL_SEC_LEVEL + 1,
3101 .mcgrps = nl802154_mcgrps,
3102 .n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
3103 };
3104
3105 /* initialisation/exit functions */
nl802154_init(void)3106 int __init nl802154_init(void)
3107 {
3108 return genl_register_family(&nl802154_fam);
3109 }
3110
nl802154_exit(void)3111 void nl802154_exit(void)
3112 {
3113 genl_unregister_family(&nl802154_fam);
3114 }
3115