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 };
30
31 static const struct genl_multicast_group nl802154_mcgrps[] = {
32 [NL802154_MCGRP_CONFIG] = { .name = "config", },
33 };
34
35 /* returns ERR_PTR values */
36 static struct wpan_dev *
__cfg802154_wpan_dev_from_attrs(struct net * netns,struct nlattr ** attrs)37 __cfg802154_wpan_dev_from_attrs(struct net *netns, struct nlattr **attrs)
38 {
39 struct cfg802154_registered_device *rdev;
40 struct wpan_dev *result = NULL;
41 bool have_ifidx = attrs[NL802154_ATTR_IFINDEX];
42 bool have_wpan_dev_id = attrs[NL802154_ATTR_WPAN_DEV];
43 u64 wpan_dev_id;
44 int wpan_phy_idx = -1;
45 int ifidx = -1;
46
47 ASSERT_RTNL();
48
49 if (!have_ifidx && !have_wpan_dev_id)
50 return ERR_PTR(-EINVAL);
51
52 if (have_ifidx)
53 ifidx = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
54 if (have_wpan_dev_id) {
55 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
56 wpan_phy_idx = wpan_dev_id >> 32;
57 }
58
59 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
60 struct wpan_dev *wpan_dev;
61
62 if (wpan_phy_net(&rdev->wpan_phy) != netns)
63 continue;
64
65 if (have_wpan_dev_id && rdev->wpan_phy_idx != wpan_phy_idx)
66 continue;
67
68 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
69 if (have_ifidx && wpan_dev->netdev &&
70 wpan_dev->netdev->ifindex == ifidx) {
71 result = wpan_dev;
72 break;
73 }
74 if (have_wpan_dev_id &&
75 wpan_dev->identifier == (u32)wpan_dev_id) {
76 result = wpan_dev;
77 break;
78 }
79 }
80
81 if (result)
82 break;
83 }
84
85 if (result)
86 return result;
87
88 return ERR_PTR(-ENODEV);
89 }
90
91 static struct cfg802154_registered_device *
__cfg802154_rdev_from_attrs(struct net * netns,struct nlattr ** attrs)92 __cfg802154_rdev_from_attrs(struct net *netns, struct nlattr **attrs)
93 {
94 struct cfg802154_registered_device *rdev = NULL, *tmp;
95 struct net_device *netdev;
96
97 ASSERT_RTNL();
98
99 if (!attrs[NL802154_ATTR_WPAN_PHY] &&
100 !attrs[NL802154_ATTR_IFINDEX] &&
101 !attrs[NL802154_ATTR_WPAN_DEV])
102 return ERR_PTR(-EINVAL);
103
104 if (attrs[NL802154_ATTR_WPAN_PHY])
105 rdev = cfg802154_rdev_by_wpan_phy_idx(
106 nla_get_u32(attrs[NL802154_ATTR_WPAN_PHY]));
107
108 if (attrs[NL802154_ATTR_WPAN_DEV]) {
109 u64 wpan_dev_id = nla_get_u64(attrs[NL802154_ATTR_WPAN_DEV]);
110 struct wpan_dev *wpan_dev;
111 bool found = false;
112
113 tmp = cfg802154_rdev_by_wpan_phy_idx(wpan_dev_id >> 32);
114 if (tmp) {
115 /* make sure wpan_dev exists */
116 list_for_each_entry(wpan_dev, &tmp->wpan_dev_list, list) {
117 if (wpan_dev->identifier != (u32)wpan_dev_id)
118 continue;
119 found = true;
120 break;
121 }
122
123 if (!found)
124 tmp = NULL;
125
126 if (rdev && tmp != rdev)
127 return ERR_PTR(-EINVAL);
128 rdev = tmp;
129 }
130 }
131
132 if (attrs[NL802154_ATTR_IFINDEX]) {
133 int ifindex = nla_get_u32(attrs[NL802154_ATTR_IFINDEX]);
134
135 netdev = __dev_get_by_index(netns, ifindex);
136 if (netdev) {
137 if (netdev->ieee802154_ptr)
138 tmp = wpan_phy_to_rdev(
139 netdev->ieee802154_ptr->wpan_phy);
140 else
141 tmp = NULL;
142
143 /* not wireless device -- return error */
144 if (!tmp)
145 return ERR_PTR(-EINVAL);
146
147 /* mismatch -- return error */
148 if (rdev && tmp != rdev)
149 return ERR_PTR(-EINVAL);
150
151 rdev = tmp;
152 }
153 }
154
155 if (!rdev)
156 return ERR_PTR(-ENODEV);
157
158 if (netns != wpan_phy_net(&rdev->wpan_phy))
159 return ERR_PTR(-ENODEV);
160
161 return rdev;
162 }
163
164 /* This function returns a pointer to the driver
165 * that the genl_info item that is passed refers to.
166 *
167 * The result of this can be a PTR_ERR and hence must
168 * be checked with IS_ERR() for errors.
169 */
170 static struct cfg802154_registered_device *
cfg802154_get_dev_from_info(struct net * netns,struct genl_info * info)171 cfg802154_get_dev_from_info(struct net *netns, struct genl_info *info)
172 {
173 return __cfg802154_rdev_from_attrs(netns, info->attrs);
174 }
175
176 /* policy for the attributes */
177 static const struct nla_policy nl802154_policy[NL802154_ATTR_MAX+1] = {
178 [NL802154_ATTR_WPAN_PHY] = { .type = NLA_U32 },
179 [NL802154_ATTR_WPAN_PHY_NAME] = { .type = NLA_NUL_STRING,
180 .len = 20-1 },
181
182 [NL802154_ATTR_IFINDEX] = { .type = NLA_U32 },
183 [NL802154_ATTR_IFTYPE] = { .type = NLA_U32 },
184 [NL802154_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
185
186 [NL802154_ATTR_WPAN_DEV] = { .type = NLA_U64 },
187
188 [NL802154_ATTR_PAGE] = { .type = NLA_U8, },
189 [NL802154_ATTR_CHANNEL] = { .type = NLA_U8, },
190
191 [NL802154_ATTR_TX_POWER] = { .type = NLA_S32, },
192
193 [NL802154_ATTR_CCA_MODE] = { .type = NLA_U32, },
194 [NL802154_ATTR_CCA_OPT] = { .type = NLA_U32, },
195 [NL802154_ATTR_CCA_ED_LEVEL] = { .type = NLA_S32, },
196
197 [NL802154_ATTR_SUPPORTED_CHANNEL] = { .type = NLA_U32, },
198
199 [NL802154_ATTR_PAN_ID] = { .type = NLA_U16, },
200 [NL802154_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
201 [NL802154_ATTR_SHORT_ADDR] = { .type = NLA_U16, },
202
203 [NL802154_ATTR_MIN_BE] = { .type = NLA_U8, },
204 [NL802154_ATTR_MAX_BE] = { .type = NLA_U8, },
205 [NL802154_ATTR_MAX_CSMA_BACKOFFS] = { .type = NLA_U8, },
206
207 [NL802154_ATTR_MAX_FRAME_RETRIES] = { .type = NLA_S8, },
208
209 [NL802154_ATTR_LBT_MODE] = { .type = NLA_U8, },
210
211 [NL802154_ATTR_WPAN_PHY_CAPS] = { .type = NLA_NESTED },
212
213 [NL802154_ATTR_SUPPORTED_COMMANDS] = { .type = NLA_NESTED },
214
215 [NL802154_ATTR_ACKREQ_DEFAULT] = { .type = NLA_U8 },
216
217 [NL802154_ATTR_PID] = { .type = NLA_U32 },
218 [NL802154_ATTR_NETNS_FD] = { .type = NLA_U32 },
219 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
220 [NL802154_ATTR_SEC_ENABLED] = { .type = NLA_U8, },
221 [NL802154_ATTR_SEC_OUT_LEVEL] = { .type = NLA_U32, },
222 [NL802154_ATTR_SEC_OUT_KEY_ID] = { .type = NLA_NESTED, },
223 [NL802154_ATTR_SEC_FRAME_COUNTER] = { .type = NLA_U32 },
224
225 [NL802154_ATTR_SEC_LEVEL] = { .type = NLA_NESTED },
226 [NL802154_ATTR_SEC_DEVICE] = { .type = NLA_NESTED },
227 [NL802154_ATTR_SEC_DEVKEY] = { .type = NLA_NESTED },
228 [NL802154_ATTR_SEC_KEY] = { .type = NLA_NESTED },
229 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
230 };
231
232 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
233 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)234 nl802154_prepare_wpan_dev_dump(struct sk_buff *skb,
235 struct netlink_callback *cb,
236 struct cfg802154_registered_device **rdev,
237 struct wpan_dev **wpan_dev)
238 {
239 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
240 int err;
241
242 rtnl_lock();
243
244 if (!cb->args[0]) {
245 *wpan_dev = __cfg802154_wpan_dev_from_attrs(sock_net(skb->sk),
246 info->attrs);
247 if (IS_ERR(*wpan_dev)) {
248 err = PTR_ERR(*wpan_dev);
249 goto out_unlock;
250 }
251 *rdev = wpan_phy_to_rdev((*wpan_dev)->wpan_phy);
252 /* 0 is the first index - add 1 to parse only once */
253 cb->args[0] = (*rdev)->wpan_phy_idx + 1;
254 cb->args[1] = (*wpan_dev)->identifier;
255 } else {
256 /* subtract the 1 again here */
257 struct wpan_phy *wpan_phy = wpan_phy_idx_to_wpan_phy(cb->args[0] - 1);
258 struct wpan_dev *tmp;
259
260 if (!wpan_phy) {
261 err = -ENODEV;
262 goto out_unlock;
263 }
264 *rdev = wpan_phy_to_rdev(wpan_phy);
265 *wpan_dev = NULL;
266
267 list_for_each_entry(tmp, &(*rdev)->wpan_dev_list, list) {
268 if (tmp->identifier == cb->args[1]) {
269 *wpan_dev = tmp;
270 break;
271 }
272 }
273
274 if (!*wpan_dev) {
275 err = -ENODEV;
276 goto out_unlock;
277 }
278 }
279
280 return 0;
281 out_unlock:
282 rtnl_unlock();
283 return err;
284 }
285
286 static void
nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device * rdev)287 nl802154_finish_wpan_dev_dump(struct cfg802154_registered_device *rdev)
288 {
289 rtnl_unlock();
290 }
291 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
292
293 /* message building helper */
nl802154hdr_put(struct sk_buff * skb,u32 portid,u32 seq,int flags,u8 cmd)294 static inline void *nl802154hdr_put(struct sk_buff *skb, u32 portid, u32 seq,
295 int flags, u8 cmd)
296 {
297 /* since there is no private header just add the generic one */
298 return genlmsg_put(skb, portid, seq, &nl802154_fam, flags, cmd);
299 }
300
301 static int
nl802154_put_flags(struct sk_buff * msg,int attr,u32 mask)302 nl802154_put_flags(struct sk_buff *msg, int attr, u32 mask)
303 {
304 struct nlattr *nl_flags = nla_nest_start_noflag(msg, attr);
305 int i;
306
307 if (!nl_flags)
308 return -ENOBUFS;
309
310 i = 0;
311 while (mask) {
312 if ((mask & 1) && nla_put_flag(msg, i))
313 return -ENOBUFS;
314
315 mask >>= 1;
316 i++;
317 }
318
319 nla_nest_end(msg, nl_flags);
320 return 0;
321 }
322
323 static int
nl802154_send_wpan_phy_channels(struct cfg802154_registered_device * rdev,struct sk_buff * msg)324 nl802154_send_wpan_phy_channels(struct cfg802154_registered_device *rdev,
325 struct sk_buff *msg)
326 {
327 struct nlattr *nl_page;
328 unsigned long page;
329
330 nl_page = nla_nest_start_noflag(msg, NL802154_ATTR_CHANNELS_SUPPORTED);
331 if (!nl_page)
332 return -ENOBUFS;
333
334 for (page = 0; page <= IEEE802154_MAX_PAGE; page++) {
335 if (nla_put_u32(msg, NL802154_ATTR_SUPPORTED_CHANNEL,
336 rdev->wpan_phy.supported.channels[page]))
337 return -ENOBUFS;
338 }
339 nla_nest_end(msg, nl_page);
340
341 return 0;
342 }
343
344 static int
nl802154_put_capabilities(struct sk_buff * msg,struct cfg802154_registered_device * rdev)345 nl802154_put_capabilities(struct sk_buff *msg,
346 struct cfg802154_registered_device *rdev)
347 {
348 const struct wpan_phy_supported *caps = &rdev->wpan_phy.supported;
349 struct nlattr *nl_caps, *nl_channels;
350 int i;
351
352 nl_caps = nla_nest_start_noflag(msg, NL802154_ATTR_WPAN_PHY_CAPS);
353 if (!nl_caps)
354 return -ENOBUFS;
355
356 nl_channels = nla_nest_start_noflag(msg, NL802154_CAP_ATTR_CHANNELS);
357 if (!nl_channels)
358 return -ENOBUFS;
359
360 for (i = 0; i <= IEEE802154_MAX_PAGE; i++) {
361 if (caps->channels[i]) {
362 if (nl802154_put_flags(msg, i, caps->channels[i]))
363 return -ENOBUFS;
364 }
365 }
366
367 nla_nest_end(msg, nl_channels);
368
369 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
370 struct nlattr *nl_ed_lvls;
371
372 nl_ed_lvls = nla_nest_start_noflag(msg,
373 NL802154_CAP_ATTR_CCA_ED_LEVELS);
374 if (!nl_ed_lvls)
375 return -ENOBUFS;
376
377 for (i = 0; i < caps->cca_ed_levels_size; i++) {
378 if (nla_put_s32(msg, i, caps->cca_ed_levels[i]))
379 return -ENOBUFS;
380 }
381
382 nla_nest_end(msg, nl_ed_lvls);
383 }
384
385 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
386 struct nlattr *nl_tx_pwrs;
387
388 nl_tx_pwrs = nla_nest_start_noflag(msg,
389 NL802154_CAP_ATTR_TX_POWERS);
390 if (!nl_tx_pwrs)
391 return -ENOBUFS;
392
393 for (i = 0; i < caps->tx_powers_size; i++) {
394 if (nla_put_s32(msg, i, caps->tx_powers[i]))
395 return -ENOBUFS;
396 }
397
398 nla_nest_end(msg, nl_tx_pwrs);
399 }
400
401 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
402 if (nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_MODES,
403 caps->cca_modes) ||
404 nl802154_put_flags(msg, NL802154_CAP_ATTR_CCA_OPTS,
405 caps->cca_opts))
406 return -ENOBUFS;
407 }
408
409 if (nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MINBE, caps->min_minbe) ||
410 nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MINBE, caps->max_minbe) ||
411 nla_put_u8(msg, NL802154_CAP_ATTR_MIN_MAXBE, caps->min_maxbe) ||
412 nla_put_u8(msg, NL802154_CAP_ATTR_MAX_MAXBE, caps->max_maxbe) ||
413 nla_put_u8(msg, NL802154_CAP_ATTR_MIN_CSMA_BACKOFFS,
414 caps->min_csma_backoffs) ||
415 nla_put_u8(msg, NL802154_CAP_ATTR_MAX_CSMA_BACKOFFS,
416 caps->max_csma_backoffs) ||
417 nla_put_s8(msg, NL802154_CAP_ATTR_MIN_FRAME_RETRIES,
418 caps->min_frame_retries) ||
419 nla_put_s8(msg, NL802154_CAP_ATTR_MAX_FRAME_RETRIES,
420 caps->max_frame_retries) ||
421 nl802154_put_flags(msg, NL802154_CAP_ATTR_IFTYPES,
422 caps->iftypes) ||
423 nla_put_u32(msg, NL802154_CAP_ATTR_LBT, caps->lbt))
424 return -ENOBUFS;
425
426 nla_nest_end(msg, nl_caps);
427
428 return 0;
429 }
430
nl802154_send_wpan_phy(struct cfg802154_registered_device * rdev,enum nl802154_commands cmd,struct sk_buff * msg,u32 portid,u32 seq,int flags)431 static int nl802154_send_wpan_phy(struct cfg802154_registered_device *rdev,
432 enum nl802154_commands cmd,
433 struct sk_buff *msg, u32 portid, u32 seq,
434 int flags)
435 {
436 struct nlattr *nl_cmds;
437 void *hdr;
438 int i;
439
440 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
441 if (!hdr)
442 return -ENOBUFS;
443
444 if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
445 nla_put_string(msg, NL802154_ATTR_WPAN_PHY_NAME,
446 wpan_phy_name(&rdev->wpan_phy)) ||
447 nla_put_u32(msg, NL802154_ATTR_GENERATION,
448 cfg802154_rdev_list_generation))
449 goto nla_put_failure;
450
451 if (cmd != NL802154_CMD_NEW_WPAN_PHY)
452 goto finish;
453
454 /* DUMP PHY PIB */
455
456 /* current channel settings */
457 if (nla_put_u8(msg, NL802154_ATTR_PAGE,
458 rdev->wpan_phy.current_page) ||
459 nla_put_u8(msg, NL802154_ATTR_CHANNEL,
460 rdev->wpan_phy.current_channel))
461 goto nla_put_failure;
462
463 /* TODO remove this behaviour, we still keep support it for a while
464 * so users can change the behaviour to the new one.
465 */
466 if (nl802154_send_wpan_phy_channels(rdev, msg))
467 goto nla_put_failure;
468
469 /* cca mode */
470 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE) {
471 if (nla_put_u32(msg, NL802154_ATTR_CCA_MODE,
472 rdev->wpan_phy.cca.mode))
473 goto nla_put_failure;
474
475 if (rdev->wpan_phy.cca.mode == NL802154_CCA_ENERGY_CARRIER) {
476 if (nla_put_u32(msg, NL802154_ATTR_CCA_OPT,
477 rdev->wpan_phy.cca.opt))
478 goto nla_put_failure;
479 }
480 }
481
482 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER) {
483 if (nla_put_s32(msg, NL802154_ATTR_TX_POWER,
484 rdev->wpan_phy.transmit_power))
485 goto nla_put_failure;
486 }
487
488 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL) {
489 if (nla_put_s32(msg, NL802154_ATTR_CCA_ED_LEVEL,
490 rdev->wpan_phy.cca_ed_level))
491 goto nla_put_failure;
492 }
493
494 if (nl802154_put_capabilities(msg, rdev))
495 goto nla_put_failure;
496
497 nl_cmds = nla_nest_start_noflag(msg, NL802154_ATTR_SUPPORTED_COMMANDS);
498 if (!nl_cmds)
499 goto nla_put_failure;
500
501 i = 0;
502 #define CMD(op, n) \
503 do { \
504 if (rdev->ops->op) { \
505 i++; \
506 if (nla_put_u32(msg, i, NL802154_CMD_ ## n)) \
507 goto nla_put_failure; \
508 } \
509 } while (0)
510
511 CMD(add_virtual_intf, NEW_INTERFACE);
512 CMD(del_virtual_intf, DEL_INTERFACE);
513 CMD(set_channel, SET_CHANNEL);
514 CMD(set_pan_id, SET_PAN_ID);
515 CMD(set_short_addr, SET_SHORT_ADDR);
516 CMD(set_backoff_exponent, SET_BACKOFF_EXPONENT);
517 CMD(set_max_csma_backoffs, SET_MAX_CSMA_BACKOFFS);
518 CMD(set_max_frame_retries, SET_MAX_FRAME_RETRIES);
519 CMD(set_lbt_mode, SET_LBT_MODE);
520 CMD(set_ackreq_default, SET_ACKREQ_DEFAULT);
521
522 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER)
523 CMD(set_tx_power, SET_TX_POWER);
524
525 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL)
526 CMD(set_cca_ed_level, SET_CCA_ED_LEVEL);
527
528 if (rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE)
529 CMD(set_cca_mode, SET_CCA_MODE);
530
531 #undef CMD
532 nla_nest_end(msg, nl_cmds);
533
534 finish:
535 genlmsg_end(msg, hdr);
536 return 0;
537
538 nla_put_failure:
539 genlmsg_cancel(msg, hdr);
540 return -EMSGSIZE;
541 }
542
543 struct nl802154_dump_wpan_phy_state {
544 s64 filter_wpan_phy;
545 long start;
546
547 };
548
nl802154_dump_wpan_phy_parse(struct sk_buff * skb,struct netlink_callback * cb,struct nl802154_dump_wpan_phy_state * state)549 static int nl802154_dump_wpan_phy_parse(struct sk_buff *skb,
550 struct netlink_callback *cb,
551 struct nl802154_dump_wpan_phy_state *state)
552 {
553 const struct genl_dumpit_info *info = genl_dumpit_info(cb);
554 struct nlattr **tb = info->attrs;
555
556 if (tb[NL802154_ATTR_WPAN_PHY])
557 state->filter_wpan_phy = nla_get_u32(tb[NL802154_ATTR_WPAN_PHY]);
558 if (tb[NL802154_ATTR_WPAN_DEV])
559 state->filter_wpan_phy = nla_get_u64(tb[NL802154_ATTR_WPAN_DEV]) >> 32;
560 if (tb[NL802154_ATTR_IFINDEX]) {
561 struct net_device *netdev;
562 struct cfg802154_registered_device *rdev;
563 int ifidx = nla_get_u32(tb[NL802154_ATTR_IFINDEX]);
564
565 netdev = __dev_get_by_index(&init_net, ifidx);
566 if (!netdev)
567 return -ENODEV;
568 if (netdev->ieee802154_ptr) {
569 rdev = wpan_phy_to_rdev(
570 netdev->ieee802154_ptr->wpan_phy);
571 state->filter_wpan_phy = rdev->wpan_phy_idx;
572 }
573 }
574
575 return 0;
576 }
577
578 static int
nl802154_dump_wpan_phy(struct sk_buff * skb,struct netlink_callback * cb)579 nl802154_dump_wpan_phy(struct sk_buff *skb, struct netlink_callback *cb)
580 {
581 int idx = 0, ret;
582 struct nl802154_dump_wpan_phy_state *state = (void *)cb->args[0];
583 struct cfg802154_registered_device *rdev;
584
585 rtnl_lock();
586 if (!state) {
587 state = kzalloc(sizeof(*state), GFP_KERNEL);
588 if (!state) {
589 rtnl_unlock();
590 return -ENOMEM;
591 }
592 state->filter_wpan_phy = -1;
593 ret = nl802154_dump_wpan_phy_parse(skb, cb, state);
594 if (ret) {
595 kfree(state);
596 rtnl_unlock();
597 return ret;
598 }
599 cb->args[0] = (long)state;
600 }
601
602 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
603 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
604 continue;
605 if (++idx <= state->start)
606 continue;
607 if (state->filter_wpan_phy != -1 &&
608 state->filter_wpan_phy != rdev->wpan_phy_idx)
609 continue;
610 /* attempt to fit multiple wpan_phy data chunks into the skb */
611 ret = nl802154_send_wpan_phy(rdev,
612 NL802154_CMD_NEW_WPAN_PHY,
613 skb,
614 NETLINK_CB(cb->skb).portid,
615 cb->nlh->nlmsg_seq, NLM_F_MULTI);
616 if (ret < 0) {
617 if ((ret == -ENOBUFS || ret == -EMSGSIZE) &&
618 !skb->len && cb->min_dump_alloc < 4096) {
619 cb->min_dump_alloc = 4096;
620 rtnl_unlock();
621 return 1;
622 }
623 idx--;
624 break;
625 }
626 break;
627 }
628 rtnl_unlock();
629
630 state->start = idx;
631
632 return skb->len;
633 }
634
nl802154_dump_wpan_phy_done(struct netlink_callback * cb)635 static int nl802154_dump_wpan_phy_done(struct netlink_callback *cb)
636 {
637 kfree((void *)cb->args[0]);
638 return 0;
639 }
640
nl802154_get_wpan_phy(struct sk_buff * skb,struct genl_info * info)641 static int nl802154_get_wpan_phy(struct sk_buff *skb, struct genl_info *info)
642 {
643 struct sk_buff *msg;
644 struct cfg802154_registered_device *rdev = info->user_ptr[0];
645
646 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
647 if (!msg)
648 return -ENOMEM;
649
650 if (nl802154_send_wpan_phy(rdev, NL802154_CMD_NEW_WPAN_PHY, msg,
651 info->snd_portid, info->snd_seq, 0) < 0) {
652 nlmsg_free(msg);
653 return -ENOBUFS;
654 }
655
656 return genlmsg_reply(msg, info);
657 }
658
wpan_dev_id(struct wpan_dev * wpan_dev)659 static inline u64 wpan_dev_id(struct wpan_dev *wpan_dev)
660 {
661 return (u64)wpan_dev->identifier |
662 ((u64)wpan_phy_to_rdev(wpan_dev->wpan_phy)->wpan_phy_idx << 32);
663 }
664
665 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
666 #include <net/ieee802154_netdev.h>
667
668 static int
ieee802154_llsec_send_key_id(struct sk_buff * msg,const struct ieee802154_llsec_key_id * desc)669 ieee802154_llsec_send_key_id(struct sk_buff *msg,
670 const struct ieee802154_llsec_key_id *desc)
671 {
672 struct nlattr *nl_dev_addr;
673
674 if (nla_put_u32(msg, NL802154_KEY_ID_ATTR_MODE, desc->mode))
675 return -ENOBUFS;
676
677 switch (desc->mode) {
678 case NL802154_KEY_ID_MODE_IMPLICIT:
679 nl_dev_addr = nla_nest_start_noflag(msg,
680 NL802154_KEY_ID_ATTR_IMPLICIT);
681 if (!nl_dev_addr)
682 return -ENOBUFS;
683
684 if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_PAN_ID,
685 desc->device_addr.pan_id) ||
686 nla_put_u32(msg, NL802154_DEV_ADDR_ATTR_MODE,
687 desc->device_addr.mode))
688 return -ENOBUFS;
689
690 switch (desc->device_addr.mode) {
691 case NL802154_DEV_ADDR_SHORT:
692 if (nla_put_le16(msg, NL802154_DEV_ADDR_ATTR_SHORT,
693 desc->device_addr.short_addr))
694 return -ENOBUFS;
695 break;
696 case NL802154_DEV_ADDR_EXTENDED:
697 if (nla_put_le64(msg, NL802154_DEV_ADDR_ATTR_EXTENDED,
698 desc->device_addr.extended_addr,
699 NL802154_DEV_ADDR_ATTR_PAD))
700 return -ENOBUFS;
701 break;
702 default:
703 /* userspace should handle unknown */
704 break;
705 }
706
707 nla_nest_end(msg, nl_dev_addr);
708 break;
709 case NL802154_KEY_ID_MODE_INDEX:
710 break;
711 case NL802154_KEY_ID_MODE_INDEX_SHORT:
712 /* TODO renmae short_source? */
713 if (nla_put_le32(msg, NL802154_KEY_ID_ATTR_SOURCE_SHORT,
714 desc->short_source))
715 return -ENOBUFS;
716 break;
717 case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
718 if (nla_put_le64(msg, NL802154_KEY_ID_ATTR_SOURCE_EXTENDED,
719 desc->extended_source,
720 NL802154_KEY_ID_ATTR_PAD))
721 return -ENOBUFS;
722 break;
723 default:
724 /* userspace should handle unknown */
725 break;
726 }
727
728 /* TODO key_id to key_idx ? Check naming */
729 if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
730 if (nla_put_u8(msg, NL802154_KEY_ID_ATTR_INDEX, desc->id))
731 return -ENOBUFS;
732 }
733
734 return 0;
735 }
736
nl802154_get_llsec_params(struct sk_buff * msg,struct cfg802154_registered_device * rdev,struct wpan_dev * wpan_dev)737 static int nl802154_get_llsec_params(struct sk_buff *msg,
738 struct cfg802154_registered_device *rdev,
739 struct wpan_dev *wpan_dev)
740 {
741 struct nlattr *nl_key_id;
742 struct ieee802154_llsec_params params;
743 int ret;
744
745 ret = rdev_get_llsec_params(rdev, wpan_dev, ¶ms);
746 if (ret < 0)
747 return ret;
748
749 if (nla_put_u8(msg, NL802154_ATTR_SEC_ENABLED, params.enabled) ||
750 nla_put_u32(msg, NL802154_ATTR_SEC_OUT_LEVEL, params.out_level) ||
751 nla_put_be32(msg, NL802154_ATTR_SEC_FRAME_COUNTER,
752 params.frame_counter))
753 return -ENOBUFS;
754
755 nl_key_id = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_OUT_KEY_ID);
756 if (!nl_key_id)
757 return -ENOBUFS;
758
759 ret = ieee802154_llsec_send_key_id(msg, ¶ms.out_key);
760 if (ret < 0)
761 return ret;
762
763 nla_nest_end(msg, nl_key_id);
764
765 return 0;
766 }
767 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
768
769 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)770 nl802154_send_iface(struct sk_buff *msg, u32 portid, u32 seq, int flags,
771 struct cfg802154_registered_device *rdev,
772 struct wpan_dev *wpan_dev)
773 {
774 struct net_device *dev = wpan_dev->netdev;
775 void *hdr;
776
777 hdr = nl802154hdr_put(msg, portid, seq, flags,
778 NL802154_CMD_NEW_INTERFACE);
779 if (!hdr)
780 return -1;
781
782 if (dev &&
783 (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex) ||
784 nla_put_string(msg, NL802154_ATTR_IFNAME, dev->name)))
785 goto nla_put_failure;
786
787 if (nla_put_u32(msg, NL802154_ATTR_WPAN_PHY, rdev->wpan_phy_idx) ||
788 nla_put_u32(msg, NL802154_ATTR_IFTYPE, wpan_dev->iftype) ||
789 nla_put_u64_64bit(msg, NL802154_ATTR_WPAN_DEV,
790 wpan_dev_id(wpan_dev), NL802154_ATTR_PAD) ||
791 nla_put_u32(msg, NL802154_ATTR_GENERATION,
792 rdev->devlist_generation ^
793 (cfg802154_rdev_list_generation << 2)))
794 goto nla_put_failure;
795
796 /* address settings */
797 if (nla_put_le64(msg, NL802154_ATTR_EXTENDED_ADDR,
798 wpan_dev->extended_addr,
799 NL802154_ATTR_PAD) ||
800 nla_put_le16(msg, NL802154_ATTR_SHORT_ADDR,
801 wpan_dev->short_addr) ||
802 nla_put_le16(msg, NL802154_ATTR_PAN_ID, wpan_dev->pan_id))
803 goto nla_put_failure;
804
805 /* ARET handling */
806 if (nla_put_s8(msg, NL802154_ATTR_MAX_FRAME_RETRIES,
807 wpan_dev->frame_retries) ||
808 nla_put_u8(msg, NL802154_ATTR_MAX_BE, wpan_dev->max_be) ||
809 nla_put_u8(msg, NL802154_ATTR_MAX_CSMA_BACKOFFS,
810 wpan_dev->csma_retries) ||
811 nla_put_u8(msg, NL802154_ATTR_MIN_BE, wpan_dev->min_be))
812 goto nla_put_failure;
813
814 /* listen before transmit */
815 if (nla_put_u8(msg, NL802154_ATTR_LBT_MODE, wpan_dev->lbt))
816 goto nla_put_failure;
817
818 /* ackreq default behaviour */
819 if (nla_put_u8(msg, NL802154_ATTR_ACKREQ_DEFAULT, wpan_dev->ackreq))
820 goto nla_put_failure;
821
822 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
823 if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
824 goto nla_put_failure;
825 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
826
827 genlmsg_end(msg, hdr);
828 return 0;
829
830 nla_put_failure:
831 genlmsg_cancel(msg, hdr);
832 return -EMSGSIZE;
833 }
834
835 static int
nl802154_dump_interface(struct sk_buff * skb,struct netlink_callback * cb)836 nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
837 {
838 int wp_idx = 0;
839 int if_idx = 0;
840 int wp_start = cb->args[0];
841 int if_start = cb->args[1];
842 struct cfg802154_registered_device *rdev;
843 struct wpan_dev *wpan_dev;
844
845 rtnl_lock();
846 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
847 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
848 continue;
849 if (wp_idx < wp_start) {
850 wp_idx++;
851 continue;
852 }
853 if_idx = 0;
854
855 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
856 if (if_idx < if_start) {
857 if_idx++;
858 continue;
859 }
860 if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid,
861 cb->nlh->nlmsg_seq, NLM_F_MULTI,
862 rdev, wpan_dev) < 0) {
863 goto out;
864 }
865 if_idx++;
866 }
867
868 wp_idx++;
869 }
870 out:
871 rtnl_unlock();
872
873 cb->args[0] = wp_idx;
874 cb->args[1] = if_idx;
875
876 return skb->len;
877 }
878
nl802154_get_interface(struct sk_buff * skb,struct genl_info * info)879 static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info)
880 {
881 struct sk_buff *msg;
882 struct cfg802154_registered_device *rdev = info->user_ptr[0];
883 struct wpan_dev *wdev = info->user_ptr[1];
884
885 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
886 if (!msg)
887 return -ENOMEM;
888
889 if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0,
890 rdev, wdev) < 0) {
891 nlmsg_free(msg);
892 return -ENOBUFS;
893 }
894
895 return genlmsg_reply(msg, info);
896 }
897
nl802154_new_interface(struct sk_buff * skb,struct genl_info * info)898 static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
899 {
900 struct cfg802154_registered_device *rdev = info->user_ptr[0];
901 enum nl802154_iftype type = NL802154_IFTYPE_UNSPEC;
902 __le64 extended_addr = cpu_to_le64(0x0000000000000000ULL);
903
904 /* TODO avoid failing a new interface
905 * creation due to pending removal?
906 */
907
908 if (!info->attrs[NL802154_ATTR_IFNAME])
909 return -EINVAL;
910
911 if (info->attrs[NL802154_ATTR_IFTYPE]) {
912 type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]);
913 if (type > NL802154_IFTYPE_MAX ||
914 !(rdev->wpan_phy.supported.iftypes & BIT(type)))
915 return -EINVAL;
916 }
917
918 if (info->attrs[NL802154_ATTR_EXTENDED_ADDR])
919 extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
920
921 if (!rdev->ops->add_virtual_intf)
922 return -EOPNOTSUPP;
923
924 return rdev_add_virtual_intf(rdev,
925 nla_data(info->attrs[NL802154_ATTR_IFNAME]),
926 NET_NAME_USER, type, extended_addr);
927 }
928
nl802154_del_interface(struct sk_buff * skb,struct genl_info * info)929 static int nl802154_del_interface(struct sk_buff *skb, struct genl_info *info)
930 {
931 struct cfg802154_registered_device *rdev = info->user_ptr[0];
932 struct wpan_dev *wpan_dev = info->user_ptr[1];
933
934 if (!rdev->ops->del_virtual_intf)
935 return -EOPNOTSUPP;
936
937 /* If we remove a wpan device without a netdev then clear
938 * user_ptr[1] so that nl802154_post_doit won't dereference it
939 * to check if it needs to do dev_put(). Otherwise it crashes
940 * since the wpan_dev has been freed, unlike with a netdev where
941 * we need the dev_put() for the netdev to really be freed.
942 */
943 if (!wpan_dev->netdev)
944 info->user_ptr[1] = NULL;
945
946 return rdev_del_virtual_intf(rdev, wpan_dev);
947 }
948
nl802154_set_channel(struct sk_buff * skb,struct genl_info * info)949 static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
950 {
951 struct cfg802154_registered_device *rdev = info->user_ptr[0];
952 u8 channel, page;
953
954 if (!info->attrs[NL802154_ATTR_PAGE] ||
955 !info->attrs[NL802154_ATTR_CHANNEL])
956 return -EINVAL;
957
958 page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
959 channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
960
961 /* check 802.15.4 constraints */
962 if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL ||
963 !(rdev->wpan_phy.supported.channels[page] & BIT(channel)))
964 return -EINVAL;
965
966 return rdev_set_channel(rdev, page, channel);
967 }
968
nl802154_set_cca_mode(struct sk_buff * skb,struct genl_info * info)969 static int nl802154_set_cca_mode(struct sk_buff *skb, struct genl_info *info)
970 {
971 struct cfg802154_registered_device *rdev = info->user_ptr[0];
972 struct wpan_phy_cca cca;
973
974 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE))
975 return -EOPNOTSUPP;
976
977 if (!info->attrs[NL802154_ATTR_CCA_MODE])
978 return -EINVAL;
979
980 cca.mode = nla_get_u32(info->attrs[NL802154_ATTR_CCA_MODE]);
981 /* checking 802.15.4 constraints */
982 if (cca.mode < NL802154_CCA_ENERGY ||
983 cca.mode > NL802154_CCA_ATTR_MAX ||
984 !(rdev->wpan_phy.supported.cca_modes & BIT(cca.mode)))
985 return -EINVAL;
986
987 if (cca.mode == NL802154_CCA_ENERGY_CARRIER) {
988 if (!info->attrs[NL802154_ATTR_CCA_OPT])
989 return -EINVAL;
990
991 cca.opt = nla_get_u32(info->attrs[NL802154_ATTR_CCA_OPT]);
992 if (cca.opt > NL802154_CCA_OPT_ATTR_MAX ||
993 !(rdev->wpan_phy.supported.cca_opts & BIT(cca.opt)))
994 return -EINVAL;
995 }
996
997 return rdev_set_cca_mode(rdev, &cca);
998 }
999
nl802154_set_cca_ed_level(struct sk_buff * skb,struct genl_info * info)1000 static int nl802154_set_cca_ed_level(struct sk_buff *skb, struct genl_info *info)
1001 {
1002 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1003 s32 ed_level;
1004 int i;
1005
1006 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL))
1007 return -EOPNOTSUPP;
1008
1009 if (!info->attrs[NL802154_ATTR_CCA_ED_LEVEL])
1010 return -EINVAL;
1011
1012 ed_level = nla_get_s32(info->attrs[NL802154_ATTR_CCA_ED_LEVEL]);
1013
1014 for (i = 0; i < rdev->wpan_phy.supported.cca_ed_levels_size; i++) {
1015 if (ed_level == rdev->wpan_phy.supported.cca_ed_levels[i])
1016 return rdev_set_cca_ed_level(rdev, ed_level);
1017 }
1018
1019 return -EINVAL;
1020 }
1021
nl802154_set_tx_power(struct sk_buff * skb,struct genl_info * info)1022 static int nl802154_set_tx_power(struct sk_buff *skb, struct genl_info *info)
1023 {
1024 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1025 s32 power;
1026 int i;
1027
1028 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER))
1029 return -EOPNOTSUPP;
1030
1031 if (!info->attrs[NL802154_ATTR_TX_POWER])
1032 return -EINVAL;
1033
1034 power = nla_get_s32(info->attrs[NL802154_ATTR_TX_POWER]);
1035
1036 for (i = 0; i < rdev->wpan_phy.supported.tx_powers_size; i++) {
1037 if (power == rdev->wpan_phy.supported.tx_powers[i])
1038 return rdev_set_tx_power(rdev, power);
1039 }
1040
1041 return -EINVAL;
1042 }
1043
nl802154_set_pan_id(struct sk_buff * skb,struct genl_info * info)1044 static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
1045 {
1046 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1047 struct net_device *dev = info->user_ptr[1];
1048 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1049 __le16 pan_id;
1050
1051 /* conflict here while tx/rx calls */
1052 if (netif_running(dev))
1053 return -EBUSY;
1054
1055 if (wpan_dev->lowpan_dev) {
1056 if (netif_running(wpan_dev->lowpan_dev))
1057 return -EBUSY;
1058 }
1059
1060 /* don't change address fields on monitor */
1061 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1062 !info->attrs[NL802154_ATTR_PAN_ID])
1063 return -EINVAL;
1064
1065 pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
1066
1067 /* TODO
1068 * I am not sure about to check here on broadcast pan_id.
1069 * Broadcast is a valid setting, comment from 802.15.4:
1070 * If this value is 0xffff, the device is not associated.
1071 *
1072 * This could useful to simple deassociate an device.
1073 */
1074 if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
1075 return -EINVAL;
1076
1077 return rdev_set_pan_id(rdev, wpan_dev, pan_id);
1078 }
1079
nl802154_set_short_addr(struct sk_buff * skb,struct genl_info * info)1080 static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
1081 {
1082 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1083 struct net_device *dev = info->user_ptr[1];
1084 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1085 __le16 short_addr;
1086
1087 /* conflict here while tx/rx calls */
1088 if (netif_running(dev))
1089 return -EBUSY;
1090
1091 if (wpan_dev->lowpan_dev) {
1092 if (netif_running(wpan_dev->lowpan_dev))
1093 return -EBUSY;
1094 }
1095
1096 /* don't change address fields on monitor */
1097 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1098 !info->attrs[NL802154_ATTR_SHORT_ADDR])
1099 return -EINVAL;
1100
1101 short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
1102
1103 /* TODO
1104 * I am not sure about to check here on broadcast short_addr.
1105 * Broadcast is a valid setting, comment from 802.15.4:
1106 * A value of 0xfffe indicates that the device has
1107 * associated but has not been allocated an address. A
1108 * value of 0xffff indicates that the device does not
1109 * have a short address.
1110 *
1111 * I think we should allow to set these settings but
1112 * don't allow to allow socket communication with it.
1113 */
1114 if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
1115 short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
1116 return -EINVAL;
1117
1118 return rdev_set_short_addr(rdev, wpan_dev, short_addr);
1119 }
1120
1121 static int
nl802154_set_backoff_exponent(struct sk_buff * skb,struct genl_info * info)1122 nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info)
1123 {
1124 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1125 struct net_device *dev = info->user_ptr[1];
1126 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1127 u8 min_be, max_be;
1128
1129 /* should be set on netif open inside phy settings */
1130 if (netif_running(dev))
1131 return -EBUSY;
1132
1133 if (!info->attrs[NL802154_ATTR_MIN_BE] ||
1134 !info->attrs[NL802154_ATTR_MAX_BE])
1135 return -EINVAL;
1136
1137 min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]);
1138 max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]);
1139
1140 /* check 802.15.4 constraints */
1141 if (min_be < rdev->wpan_phy.supported.min_minbe ||
1142 min_be > rdev->wpan_phy.supported.max_minbe ||
1143 max_be < rdev->wpan_phy.supported.min_maxbe ||
1144 max_be > rdev->wpan_phy.supported.max_maxbe ||
1145 min_be > max_be)
1146 return -EINVAL;
1147
1148 return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);
1149 }
1150
1151 static int
nl802154_set_max_csma_backoffs(struct sk_buff * skb,struct genl_info * info)1152 nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
1153 {
1154 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1155 struct net_device *dev = info->user_ptr[1];
1156 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1157 u8 max_csma_backoffs;
1158
1159 /* conflict here while other running iface settings */
1160 if (netif_running(dev))
1161 return -EBUSY;
1162
1163 if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])
1164 return -EINVAL;
1165
1166 max_csma_backoffs = nla_get_u8(
1167 info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);
1168
1169 /* check 802.15.4 constraints */
1170 if (max_csma_backoffs < rdev->wpan_phy.supported.min_csma_backoffs ||
1171 max_csma_backoffs > rdev->wpan_phy.supported.max_csma_backoffs)
1172 return -EINVAL;
1173
1174 return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
1175 }
1176
1177 static int
nl802154_set_max_frame_retries(struct sk_buff * skb,struct genl_info * info)1178 nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
1179 {
1180 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1181 struct net_device *dev = info->user_ptr[1];
1182 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1183 s8 max_frame_retries;
1184
1185 if (netif_running(dev))
1186 return -EBUSY;
1187
1188 if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES])
1189 return -EINVAL;
1190
1191 max_frame_retries = nla_get_s8(
1192 info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]);
1193
1194 /* check 802.15.4 constraints */
1195 if (max_frame_retries < rdev->wpan_phy.supported.min_frame_retries ||
1196 max_frame_retries > rdev->wpan_phy.supported.max_frame_retries)
1197 return -EINVAL;
1198
1199 return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
1200 }
1201
nl802154_set_lbt_mode(struct sk_buff * skb,struct genl_info * info)1202 static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
1203 {
1204 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1205 struct net_device *dev = info->user_ptr[1];
1206 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1207 int mode;
1208
1209 if (netif_running(dev))
1210 return -EBUSY;
1211
1212 if (!info->attrs[NL802154_ATTR_LBT_MODE])
1213 return -EINVAL;
1214
1215 mode = nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
1216
1217 if (mode != 0 && mode != 1)
1218 return -EINVAL;
1219
1220 if (!wpan_phy_supported_bool(mode, rdev->wpan_phy.supported.lbt))
1221 return -EINVAL;
1222
1223 return rdev_set_lbt_mode(rdev, wpan_dev, mode);
1224 }
1225
1226 static int
nl802154_set_ackreq_default(struct sk_buff * skb,struct genl_info * info)1227 nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
1228 {
1229 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1230 struct net_device *dev = info->user_ptr[1];
1231 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1232 int ackreq;
1233
1234 if (netif_running(dev))
1235 return -EBUSY;
1236
1237 if (!info->attrs[NL802154_ATTR_ACKREQ_DEFAULT])
1238 return -EINVAL;
1239
1240 ackreq = nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
1241
1242 if (ackreq != 0 && ackreq != 1)
1243 return -EINVAL;
1244
1245 return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
1246 }
1247
nl802154_wpan_phy_netns(struct sk_buff * skb,struct genl_info * info)1248 static int nl802154_wpan_phy_netns(struct sk_buff *skb, struct genl_info *info)
1249 {
1250 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1251 struct net *net;
1252 int err;
1253
1254 if (info->attrs[NL802154_ATTR_PID]) {
1255 u32 pid = nla_get_u32(info->attrs[NL802154_ATTR_PID]);
1256
1257 net = get_net_ns_by_pid(pid);
1258 } else if (info->attrs[NL802154_ATTR_NETNS_FD]) {
1259 u32 fd = nla_get_u32(info->attrs[NL802154_ATTR_NETNS_FD]);
1260
1261 net = get_net_ns_by_fd(fd);
1262 } else {
1263 return -EINVAL;
1264 }
1265
1266 if (IS_ERR(net))
1267 return PTR_ERR(net);
1268
1269 err = 0;
1270
1271 /* check if anything to do */
1272 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), net))
1273 err = cfg802154_switch_netns(rdev, net);
1274
1275 put_net(net);
1276 return err;
1277 }
1278
1279 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
1280 static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
1281 [NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
1282 [NL802154_DEV_ADDR_ATTR_MODE] = { .type = NLA_U32 },
1283 [NL802154_DEV_ADDR_ATTR_SHORT] = { .type = NLA_U16 },
1284 [NL802154_DEV_ADDR_ATTR_EXTENDED] = { .type = NLA_U64 },
1285 };
1286
1287 static int
ieee802154_llsec_parse_dev_addr(struct nlattr * nla,struct ieee802154_addr * addr)1288 ieee802154_llsec_parse_dev_addr(struct nlattr *nla,
1289 struct ieee802154_addr *addr)
1290 {
1291 struct nlattr *attrs[NL802154_DEV_ADDR_ATTR_MAX + 1];
1292
1293 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_DEV_ADDR_ATTR_MAX, nla, nl802154_dev_addr_policy, NULL))
1294 return -EINVAL;
1295
1296 if (!attrs[NL802154_DEV_ADDR_ATTR_PAN_ID] ||
1297 !attrs[NL802154_DEV_ADDR_ATTR_MODE] ||
1298 !(attrs[NL802154_DEV_ADDR_ATTR_SHORT] ||
1299 attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]))
1300 return -EINVAL;
1301
1302 addr->pan_id = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_PAN_ID]);
1303 addr->mode = nla_get_u32(attrs[NL802154_DEV_ADDR_ATTR_MODE]);
1304 switch (addr->mode) {
1305 case NL802154_DEV_ADDR_SHORT:
1306 addr->short_addr = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_SHORT]);
1307 break;
1308 case NL802154_DEV_ADDR_EXTENDED:
1309 addr->extended_addr = nla_get_le64(attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]);
1310 break;
1311 default:
1312 return -EINVAL;
1313 }
1314
1315 return 0;
1316 }
1317
1318 static const struct nla_policy nl802154_key_id_policy[NL802154_KEY_ID_ATTR_MAX + 1] = {
1319 [NL802154_KEY_ID_ATTR_MODE] = { .type = NLA_U32 },
1320 [NL802154_KEY_ID_ATTR_INDEX] = { .type = NLA_U8 },
1321 [NL802154_KEY_ID_ATTR_IMPLICIT] = { .type = NLA_NESTED },
1322 [NL802154_KEY_ID_ATTR_SOURCE_SHORT] = { .type = NLA_U32 },
1323 [NL802154_KEY_ID_ATTR_SOURCE_EXTENDED] = { .type = NLA_U64 },
1324 };
1325
1326 static int
ieee802154_llsec_parse_key_id(struct nlattr * nla,struct ieee802154_llsec_key_id * desc)1327 ieee802154_llsec_parse_key_id(struct nlattr *nla,
1328 struct ieee802154_llsec_key_id *desc)
1329 {
1330 struct nlattr *attrs[NL802154_KEY_ID_ATTR_MAX + 1];
1331
1332 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_KEY_ID_ATTR_MAX, nla, nl802154_key_id_policy, NULL))
1333 return -EINVAL;
1334
1335 if (!attrs[NL802154_KEY_ID_ATTR_MODE])
1336 return -EINVAL;
1337
1338 desc->mode = nla_get_u32(attrs[NL802154_KEY_ID_ATTR_MODE]);
1339 switch (desc->mode) {
1340 case NL802154_KEY_ID_MODE_IMPLICIT:
1341 if (!attrs[NL802154_KEY_ID_ATTR_IMPLICIT])
1342 return -EINVAL;
1343
1344 if (ieee802154_llsec_parse_dev_addr(attrs[NL802154_KEY_ID_ATTR_IMPLICIT],
1345 &desc->device_addr) < 0)
1346 return -EINVAL;
1347 break;
1348 case NL802154_KEY_ID_MODE_INDEX:
1349 break;
1350 case NL802154_KEY_ID_MODE_INDEX_SHORT:
1351 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT])
1352 return -EINVAL;
1353
1354 desc->short_source = nla_get_le32(attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT]);
1355 break;
1356 case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
1357 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED])
1358 return -EINVAL;
1359
1360 desc->extended_source = nla_get_le64(attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED]);
1361 break;
1362 default:
1363 return -EINVAL;
1364 }
1365
1366 if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
1367 if (!attrs[NL802154_KEY_ID_ATTR_INDEX])
1368 return -EINVAL;
1369
1370 /* TODO change id to idx */
1371 desc->id = nla_get_u8(attrs[NL802154_KEY_ID_ATTR_INDEX]);
1372 }
1373
1374 return 0;
1375 }
1376
nl802154_set_llsec_params(struct sk_buff * skb,struct genl_info * info)1377 static int nl802154_set_llsec_params(struct sk_buff *skb,
1378 struct genl_info *info)
1379 {
1380 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1381 struct net_device *dev = info->user_ptr[1];
1382 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1383 struct ieee802154_llsec_params params;
1384 u32 changed = 0;
1385 int ret;
1386
1387 if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
1388 u8 enabled;
1389
1390 enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1391 if (enabled != 0 && enabled != 1)
1392 return -EINVAL;
1393
1394 params.enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1395 changed |= IEEE802154_LLSEC_PARAM_ENABLED;
1396 }
1397
1398 if (info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID]) {
1399 ret = ieee802154_llsec_parse_key_id(info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID],
1400 ¶ms.out_key);
1401 if (ret < 0)
1402 return ret;
1403
1404 changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
1405 }
1406
1407 if (info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]) {
1408 params.out_level = nla_get_u32(info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]);
1409 if (params.out_level > NL802154_SECLEVEL_MAX)
1410 return -EINVAL;
1411
1412 changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
1413 }
1414
1415 if (info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]) {
1416 params.frame_counter = nla_get_be32(info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]);
1417 changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
1418 }
1419
1420 return rdev_set_llsec_params(rdev, wpan_dev, ¶ms, changed);
1421 }
1422
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)1423 static int nl802154_send_key(struct sk_buff *msg, u32 cmd, u32 portid,
1424 u32 seq, int flags,
1425 struct cfg802154_registered_device *rdev,
1426 struct net_device *dev,
1427 const struct ieee802154_llsec_key_entry *key)
1428 {
1429 void *hdr;
1430 u32 commands[NL802154_CMD_FRAME_NR_IDS / 32];
1431 struct nlattr *nl_key, *nl_key_id;
1432
1433 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1434 if (!hdr)
1435 return -1;
1436
1437 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1438 goto nla_put_failure;
1439
1440 nl_key = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_KEY);
1441 if (!nl_key)
1442 goto nla_put_failure;
1443
1444 nl_key_id = nla_nest_start_noflag(msg, NL802154_KEY_ATTR_ID);
1445 if (!nl_key_id)
1446 goto nla_put_failure;
1447
1448 if (ieee802154_llsec_send_key_id(msg, &key->id) < 0)
1449 goto nla_put_failure;
1450
1451 nla_nest_end(msg, nl_key_id);
1452
1453 if (nla_put_u8(msg, NL802154_KEY_ATTR_USAGE_FRAMES,
1454 key->key->frame_types))
1455 goto nla_put_failure;
1456
1457 if (key->key->frame_types & BIT(NL802154_FRAME_CMD)) {
1458 /* TODO for each nested */
1459 memset(commands, 0, sizeof(commands));
1460 commands[7] = key->key->cmd_frame_ids;
1461 if (nla_put(msg, NL802154_KEY_ATTR_USAGE_CMDS,
1462 sizeof(commands), commands))
1463 goto nla_put_failure;
1464 }
1465
1466 if (nla_put(msg, NL802154_KEY_ATTR_BYTES, NL802154_KEY_SIZE,
1467 key->key->key))
1468 goto nla_put_failure;
1469
1470 nla_nest_end(msg, nl_key);
1471 genlmsg_end(msg, hdr);
1472
1473 return 0;
1474
1475 nla_put_failure:
1476 genlmsg_cancel(msg, hdr);
1477 return -EMSGSIZE;
1478 }
1479
1480 static int
nl802154_dump_llsec_key(struct sk_buff * skb,struct netlink_callback * cb)1481 nl802154_dump_llsec_key(struct sk_buff *skb, struct netlink_callback *cb)
1482 {
1483 struct cfg802154_registered_device *rdev = NULL;
1484 struct ieee802154_llsec_key_entry *key;
1485 struct ieee802154_llsec_table *table;
1486 struct wpan_dev *wpan_dev;
1487 int err;
1488
1489 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1490 if (err)
1491 return err;
1492
1493 if (!wpan_dev->netdev) {
1494 err = -EINVAL;
1495 goto out_err;
1496 }
1497
1498 rdev_lock_llsec_table(rdev, wpan_dev);
1499 rdev_get_llsec_table(rdev, wpan_dev, &table);
1500
1501 /* TODO make it like station dump */
1502 if (cb->args[2])
1503 goto out;
1504
1505 list_for_each_entry(key, &table->keys, list) {
1506 if (nl802154_send_key(skb, NL802154_CMD_NEW_SEC_KEY,
1507 NETLINK_CB(cb->skb).portid,
1508 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1509 rdev, wpan_dev->netdev, key) < 0) {
1510 /* TODO */
1511 err = -EIO;
1512 rdev_unlock_llsec_table(rdev, wpan_dev);
1513 goto out_err;
1514 }
1515 }
1516
1517 cb->args[2] = 1;
1518
1519 out:
1520 rdev_unlock_llsec_table(rdev, wpan_dev);
1521 err = skb->len;
1522 out_err:
1523 nl802154_finish_wpan_dev_dump(rdev);
1524
1525 return err;
1526 }
1527
1528 static const struct nla_policy nl802154_key_policy[NL802154_KEY_ATTR_MAX + 1] = {
1529 [NL802154_KEY_ATTR_ID] = { NLA_NESTED },
1530 /* TODO handle it as for_each_nested and NLA_FLAG? */
1531 [NL802154_KEY_ATTR_USAGE_FRAMES] = { NLA_U8 },
1532 /* TODO handle it as for_each_nested, not static array? */
1533 [NL802154_KEY_ATTR_USAGE_CMDS] = { .len = NL802154_CMD_FRAME_NR_IDS / 8 },
1534 [NL802154_KEY_ATTR_BYTES] = { .len = NL802154_KEY_SIZE },
1535 };
1536
nl802154_add_llsec_key(struct sk_buff * skb,struct genl_info * info)1537 static int nl802154_add_llsec_key(struct sk_buff *skb, struct genl_info *info)
1538 {
1539 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1540 struct net_device *dev = info->user_ptr[1];
1541 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1542 struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
1543 struct ieee802154_llsec_key key = { };
1544 struct ieee802154_llsec_key_id id = { };
1545 u32 commands[NL802154_CMD_FRAME_NR_IDS / 32] = { };
1546
1547 if (nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack))
1548 return -EINVAL;
1549
1550 if (!attrs[NL802154_KEY_ATTR_USAGE_FRAMES] ||
1551 !attrs[NL802154_KEY_ATTR_BYTES])
1552 return -EINVAL;
1553
1554 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1555 return -ENOBUFS;
1556
1557 key.frame_types = nla_get_u8(attrs[NL802154_KEY_ATTR_USAGE_FRAMES]);
1558 if (key.frame_types > BIT(NL802154_FRAME_MAX) ||
1559 ((key.frame_types & BIT(NL802154_FRAME_CMD)) &&
1560 !attrs[NL802154_KEY_ATTR_USAGE_CMDS]))
1561 return -EINVAL;
1562
1563 if (attrs[NL802154_KEY_ATTR_USAGE_CMDS]) {
1564 /* TODO for each nested */
1565 nla_memcpy(commands, attrs[NL802154_KEY_ATTR_USAGE_CMDS],
1566 NL802154_CMD_FRAME_NR_IDS / 8);
1567
1568 /* TODO understand the -EINVAL logic here? last condition */
1569 if (commands[0] || commands[1] || commands[2] || commands[3] ||
1570 commands[4] || commands[5] || commands[6] ||
1571 commands[7] > BIT(NL802154_CMD_FRAME_MAX))
1572 return -EINVAL;
1573
1574 key.cmd_frame_ids = commands[7];
1575 } else {
1576 key.cmd_frame_ids = 0;
1577 }
1578
1579 nla_memcpy(key.key, attrs[NL802154_KEY_ATTR_BYTES], NL802154_KEY_SIZE);
1580
1581 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1582 return -ENOBUFS;
1583
1584 return rdev_add_llsec_key(rdev, wpan_dev, &id, &key);
1585 }
1586
nl802154_del_llsec_key(struct sk_buff * skb,struct genl_info * info)1587 static int nl802154_del_llsec_key(struct sk_buff *skb, struct genl_info *info)
1588 {
1589 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1590 struct net_device *dev = info->user_ptr[1];
1591 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1592 struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
1593 struct ieee802154_llsec_key_id id;
1594
1595 if (nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack))
1596 return -EINVAL;
1597
1598 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1599 return -ENOBUFS;
1600
1601 return rdev_del_llsec_key(rdev, wpan_dev, &id);
1602 }
1603
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)1604 static int nl802154_send_device(struct sk_buff *msg, u32 cmd, u32 portid,
1605 u32 seq, int flags,
1606 struct cfg802154_registered_device *rdev,
1607 struct net_device *dev,
1608 const struct ieee802154_llsec_device *dev_desc)
1609 {
1610 void *hdr;
1611 struct nlattr *nl_device;
1612
1613 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1614 if (!hdr)
1615 return -1;
1616
1617 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1618 goto nla_put_failure;
1619
1620 nl_device = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_DEVICE);
1621 if (!nl_device)
1622 goto nla_put_failure;
1623
1624 if (nla_put_u32(msg, NL802154_DEV_ATTR_FRAME_COUNTER,
1625 dev_desc->frame_counter) ||
1626 nla_put_le16(msg, NL802154_DEV_ATTR_PAN_ID, dev_desc->pan_id) ||
1627 nla_put_le16(msg, NL802154_DEV_ATTR_SHORT_ADDR,
1628 dev_desc->short_addr) ||
1629 nla_put_le64(msg, NL802154_DEV_ATTR_EXTENDED_ADDR,
1630 dev_desc->hwaddr, NL802154_DEV_ATTR_PAD) ||
1631 nla_put_u8(msg, NL802154_DEV_ATTR_SECLEVEL_EXEMPT,
1632 dev_desc->seclevel_exempt) ||
1633 nla_put_u32(msg, NL802154_DEV_ATTR_KEY_MODE, dev_desc->key_mode))
1634 goto nla_put_failure;
1635
1636 nla_nest_end(msg, nl_device);
1637 genlmsg_end(msg, hdr);
1638
1639 return 0;
1640
1641 nla_put_failure:
1642 genlmsg_cancel(msg, hdr);
1643 return -EMSGSIZE;
1644 }
1645
1646 static int
nl802154_dump_llsec_dev(struct sk_buff * skb,struct netlink_callback * cb)1647 nl802154_dump_llsec_dev(struct sk_buff *skb, struct netlink_callback *cb)
1648 {
1649 struct cfg802154_registered_device *rdev = NULL;
1650 struct ieee802154_llsec_device *dev;
1651 struct ieee802154_llsec_table *table;
1652 struct wpan_dev *wpan_dev;
1653 int err;
1654
1655 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1656 if (err)
1657 return err;
1658
1659 if (!wpan_dev->netdev) {
1660 err = -EINVAL;
1661 goto out_err;
1662 }
1663
1664 rdev_lock_llsec_table(rdev, wpan_dev);
1665 rdev_get_llsec_table(rdev, wpan_dev, &table);
1666
1667 /* TODO make it like station dump */
1668 if (cb->args[2])
1669 goto out;
1670
1671 list_for_each_entry(dev, &table->devices, list) {
1672 if (nl802154_send_device(skb, NL802154_CMD_NEW_SEC_LEVEL,
1673 NETLINK_CB(cb->skb).portid,
1674 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1675 rdev, wpan_dev->netdev, dev) < 0) {
1676 /* TODO */
1677 err = -EIO;
1678 rdev_unlock_llsec_table(rdev, wpan_dev);
1679 goto out_err;
1680 }
1681 }
1682
1683 cb->args[2] = 1;
1684
1685 out:
1686 rdev_unlock_llsec_table(rdev, wpan_dev);
1687 err = skb->len;
1688 out_err:
1689 nl802154_finish_wpan_dev_dump(rdev);
1690
1691 return err;
1692 }
1693
1694 static const struct nla_policy nl802154_dev_policy[NL802154_DEV_ATTR_MAX + 1] = {
1695 [NL802154_DEV_ATTR_FRAME_COUNTER] = { NLA_U32 },
1696 [NL802154_DEV_ATTR_PAN_ID] = { .type = NLA_U16 },
1697 [NL802154_DEV_ATTR_SHORT_ADDR] = { .type = NLA_U16 },
1698 [NL802154_DEV_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
1699 [NL802154_DEV_ATTR_SECLEVEL_EXEMPT] = { NLA_U8 },
1700 [NL802154_DEV_ATTR_KEY_MODE] = { NLA_U32 },
1701 };
1702
1703 static int
ieee802154_llsec_parse_device(struct nlattr * nla,struct ieee802154_llsec_device * dev)1704 ieee802154_llsec_parse_device(struct nlattr *nla,
1705 struct ieee802154_llsec_device *dev)
1706 {
1707 struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
1708
1709 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, nla, nl802154_dev_policy, NULL))
1710 return -EINVAL;
1711
1712 memset(dev, 0, sizeof(*dev));
1713
1714 if (!attrs[NL802154_DEV_ATTR_FRAME_COUNTER] ||
1715 !attrs[NL802154_DEV_ATTR_PAN_ID] ||
1716 !attrs[NL802154_DEV_ATTR_SHORT_ADDR] ||
1717 !attrs[NL802154_DEV_ATTR_EXTENDED_ADDR] ||
1718 !attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT] ||
1719 !attrs[NL802154_DEV_ATTR_KEY_MODE])
1720 return -EINVAL;
1721
1722 /* TODO be32 */
1723 dev->frame_counter = nla_get_u32(attrs[NL802154_DEV_ATTR_FRAME_COUNTER]);
1724 dev->pan_id = nla_get_le16(attrs[NL802154_DEV_ATTR_PAN_ID]);
1725 dev->short_addr = nla_get_le16(attrs[NL802154_DEV_ATTR_SHORT_ADDR]);
1726 /* TODO rename hwaddr to extended_addr */
1727 dev->hwaddr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
1728 dev->seclevel_exempt = nla_get_u8(attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT]);
1729 dev->key_mode = nla_get_u32(attrs[NL802154_DEV_ATTR_KEY_MODE]);
1730
1731 if (dev->key_mode > NL802154_DEVKEY_MAX ||
1732 (dev->seclevel_exempt != 0 && dev->seclevel_exempt != 1))
1733 return -EINVAL;
1734
1735 return 0;
1736 }
1737
nl802154_add_llsec_dev(struct sk_buff * skb,struct genl_info * info)1738 static int nl802154_add_llsec_dev(struct sk_buff *skb, struct genl_info *info)
1739 {
1740 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1741 struct net_device *dev = info->user_ptr[1];
1742 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1743 struct ieee802154_llsec_device dev_desc;
1744
1745 if (ieee802154_llsec_parse_device(info->attrs[NL802154_ATTR_SEC_DEVICE],
1746 &dev_desc) < 0)
1747 return -EINVAL;
1748
1749 return rdev_add_device(rdev, wpan_dev, &dev_desc);
1750 }
1751
nl802154_del_llsec_dev(struct sk_buff * skb,struct genl_info * info)1752 static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info)
1753 {
1754 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1755 struct net_device *dev = info->user_ptr[1];
1756 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1757 struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
1758 __le64 extended_addr;
1759
1760 if (nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack))
1761 return -EINVAL;
1762
1763 if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR])
1764 return -EINVAL;
1765
1766 extended_addr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
1767 return rdev_del_device(rdev, wpan_dev, extended_addr);
1768 }
1769
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)1770 static int nl802154_send_devkey(struct sk_buff *msg, u32 cmd, u32 portid,
1771 u32 seq, int flags,
1772 struct cfg802154_registered_device *rdev,
1773 struct net_device *dev, __le64 extended_addr,
1774 const struct ieee802154_llsec_device_key *devkey)
1775 {
1776 void *hdr;
1777 struct nlattr *nl_devkey, *nl_key_id;
1778
1779 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1780 if (!hdr)
1781 return -1;
1782
1783 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1784 goto nla_put_failure;
1785
1786 nl_devkey = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_DEVKEY);
1787 if (!nl_devkey)
1788 goto nla_put_failure;
1789
1790 if (nla_put_le64(msg, NL802154_DEVKEY_ATTR_EXTENDED_ADDR,
1791 extended_addr, NL802154_DEVKEY_ATTR_PAD) ||
1792 nla_put_u32(msg, NL802154_DEVKEY_ATTR_FRAME_COUNTER,
1793 devkey->frame_counter))
1794 goto nla_put_failure;
1795
1796 nl_key_id = nla_nest_start_noflag(msg, NL802154_DEVKEY_ATTR_ID);
1797 if (!nl_key_id)
1798 goto nla_put_failure;
1799
1800 if (ieee802154_llsec_send_key_id(msg, &devkey->key_id) < 0)
1801 goto nla_put_failure;
1802
1803 nla_nest_end(msg, nl_key_id);
1804 nla_nest_end(msg, nl_devkey);
1805 genlmsg_end(msg, hdr);
1806
1807 return 0;
1808
1809 nla_put_failure:
1810 genlmsg_cancel(msg, hdr);
1811 return -EMSGSIZE;
1812 }
1813
1814 static int
nl802154_dump_llsec_devkey(struct sk_buff * skb,struct netlink_callback * cb)1815 nl802154_dump_llsec_devkey(struct sk_buff *skb, struct netlink_callback *cb)
1816 {
1817 struct cfg802154_registered_device *rdev = NULL;
1818 struct ieee802154_llsec_device_key *kpos;
1819 struct ieee802154_llsec_device *dpos;
1820 struct ieee802154_llsec_table *table;
1821 struct wpan_dev *wpan_dev;
1822 int err;
1823
1824 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1825 if (err)
1826 return err;
1827
1828 if (!wpan_dev->netdev) {
1829 err = -EINVAL;
1830 goto out_err;
1831 }
1832
1833 rdev_lock_llsec_table(rdev, wpan_dev);
1834 rdev_get_llsec_table(rdev, wpan_dev, &table);
1835
1836 /* TODO make it like station dump */
1837 if (cb->args[2])
1838 goto out;
1839
1840 /* TODO look if remove devkey and do some nested attribute */
1841 list_for_each_entry(dpos, &table->devices, list) {
1842 list_for_each_entry(kpos, &dpos->keys, list) {
1843 if (nl802154_send_devkey(skb,
1844 NL802154_CMD_NEW_SEC_LEVEL,
1845 NETLINK_CB(cb->skb).portid,
1846 cb->nlh->nlmsg_seq,
1847 NLM_F_MULTI, rdev,
1848 wpan_dev->netdev,
1849 dpos->hwaddr,
1850 kpos) < 0) {
1851 /* TODO */
1852 err = -EIO;
1853 rdev_unlock_llsec_table(rdev, wpan_dev);
1854 goto out_err;
1855 }
1856 }
1857 }
1858
1859 cb->args[2] = 1;
1860
1861 out:
1862 rdev_unlock_llsec_table(rdev, wpan_dev);
1863 err = skb->len;
1864 out_err:
1865 nl802154_finish_wpan_dev_dump(rdev);
1866
1867 return err;
1868 }
1869
1870 static const struct nla_policy nl802154_devkey_policy[NL802154_DEVKEY_ATTR_MAX + 1] = {
1871 [NL802154_DEVKEY_ATTR_FRAME_COUNTER] = { NLA_U32 },
1872 [NL802154_DEVKEY_ATTR_EXTENDED_ADDR] = { NLA_U64 },
1873 [NL802154_DEVKEY_ATTR_ID] = { NLA_NESTED },
1874 };
1875
nl802154_add_llsec_devkey(struct sk_buff * skb,struct genl_info * info)1876 static int nl802154_add_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
1877 {
1878 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1879 struct net_device *dev = info->user_ptr[1];
1880 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1881 struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
1882 struct ieee802154_llsec_device_key key;
1883 __le64 extended_addr;
1884
1885 if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
1886 nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack) < 0)
1887 return -EINVAL;
1888
1889 if (!attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER] ||
1890 !attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
1891 return -EINVAL;
1892
1893 /* TODO change key.id ? */
1894 if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
1895 &key.key_id) < 0)
1896 return -ENOBUFS;
1897
1898 /* TODO be32 */
1899 key.frame_counter = nla_get_u32(attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER]);
1900 /* TODO change naming hwaddr -> extended_addr
1901 * check unique identifier short+pan OR extended_addr
1902 */
1903 extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
1904 return rdev_add_devkey(rdev, wpan_dev, extended_addr, &key);
1905 }
1906
nl802154_del_llsec_devkey(struct sk_buff * skb,struct genl_info * info)1907 static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
1908 {
1909 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1910 struct net_device *dev = info->user_ptr[1];
1911 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1912 struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
1913 struct ieee802154_llsec_device_key key;
1914 __le64 extended_addr;
1915
1916 if (nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack))
1917 return -EINVAL;
1918
1919 if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
1920 return -EINVAL;
1921
1922 /* TODO change key.id ? */
1923 if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
1924 &key.key_id) < 0)
1925 return -ENOBUFS;
1926
1927 /* TODO change naming hwaddr -> extended_addr
1928 * check unique identifier short+pan OR extended_addr
1929 */
1930 extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
1931 return rdev_del_devkey(rdev, wpan_dev, extended_addr, &key);
1932 }
1933
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)1934 static int nl802154_send_seclevel(struct sk_buff *msg, u32 cmd, u32 portid,
1935 u32 seq, int flags,
1936 struct cfg802154_registered_device *rdev,
1937 struct net_device *dev,
1938 const struct ieee802154_llsec_seclevel *sl)
1939 {
1940 void *hdr;
1941 struct nlattr *nl_seclevel;
1942
1943 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1944 if (!hdr)
1945 return -1;
1946
1947 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1948 goto nla_put_failure;
1949
1950 nl_seclevel = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_LEVEL);
1951 if (!nl_seclevel)
1952 goto nla_put_failure;
1953
1954 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_FRAME, sl->frame_type) ||
1955 nla_put_u32(msg, NL802154_SECLEVEL_ATTR_LEVELS, sl->sec_levels) ||
1956 nla_put_u8(msg, NL802154_SECLEVEL_ATTR_DEV_OVERRIDE,
1957 sl->device_override))
1958 goto nla_put_failure;
1959
1960 if (sl->frame_type == NL802154_FRAME_CMD) {
1961 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_CMD_FRAME,
1962 sl->cmd_frame_id))
1963 goto nla_put_failure;
1964 }
1965
1966 nla_nest_end(msg, nl_seclevel);
1967 genlmsg_end(msg, hdr);
1968
1969 return 0;
1970
1971 nla_put_failure:
1972 genlmsg_cancel(msg, hdr);
1973 return -EMSGSIZE;
1974 }
1975
1976 static int
nl802154_dump_llsec_seclevel(struct sk_buff * skb,struct netlink_callback * cb)1977 nl802154_dump_llsec_seclevel(struct sk_buff *skb, struct netlink_callback *cb)
1978 {
1979 struct cfg802154_registered_device *rdev = NULL;
1980 struct ieee802154_llsec_seclevel *sl;
1981 struct ieee802154_llsec_table *table;
1982 struct wpan_dev *wpan_dev;
1983 int err;
1984
1985 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1986 if (err)
1987 return err;
1988
1989 if (!wpan_dev->netdev) {
1990 err = -EINVAL;
1991 goto out_err;
1992 }
1993
1994 rdev_lock_llsec_table(rdev, wpan_dev);
1995 rdev_get_llsec_table(rdev, wpan_dev, &table);
1996
1997 /* TODO make it like station dump */
1998 if (cb->args[2])
1999 goto out;
2000
2001 list_for_each_entry(sl, &table->security_levels, list) {
2002 if (nl802154_send_seclevel(skb, NL802154_CMD_NEW_SEC_LEVEL,
2003 NETLINK_CB(cb->skb).portid,
2004 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2005 rdev, wpan_dev->netdev, sl) < 0) {
2006 /* TODO */
2007 err = -EIO;
2008 rdev_unlock_llsec_table(rdev, wpan_dev);
2009 goto out_err;
2010 }
2011 }
2012
2013 cb->args[2] = 1;
2014
2015 out:
2016 rdev_unlock_llsec_table(rdev, wpan_dev);
2017 err = skb->len;
2018 out_err:
2019 nl802154_finish_wpan_dev_dump(rdev);
2020
2021 return err;
2022 }
2023
2024 static const struct nla_policy nl802154_seclevel_policy[NL802154_SECLEVEL_ATTR_MAX + 1] = {
2025 [NL802154_SECLEVEL_ATTR_LEVELS] = { .type = NLA_U8 },
2026 [NL802154_SECLEVEL_ATTR_FRAME] = { .type = NLA_U32 },
2027 [NL802154_SECLEVEL_ATTR_CMD_FRAME] = { .type = NLA_U32 },
2028 [NL802154_SECLEVEL_ATTR_DEV_OVERRIDE] = { .type = NLA_U8 },
2029 };
2030
2031 static int
llsec_parse_seclevel(struct nlattr * nla,struct ieee802154_llsec_seclevel * sl)2032 llsec_parse_seclevel(struct nlattr *nla, struct ieee802154_llsec_seclevel *sl)
2033 {
2034 struct nlattr *attrs[NL802154_SECLEVEL_ATTR_MAX + 1];
2035
2036 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_SECLEVEL_ATTR_MAX, nla, nl802154_seclevel_policy, NULL))
2037 return -EINVAL;
2038
2039 memset(sl, 0, sizeof(*sl));
2040
2041 if (!attrs[NL802154_SECLEVEL_ATTR_LEVELS] ||
2042 !attrs[NL802154_SECLEVEL_ATTR_FRAME] ||
2043 !attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE])
2044 return -EINVAL;
2045
2046 sl->sec_levels = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_LEVELS]);
2047 sl->frame_type = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_FRAME]);
2048 sl->device_override = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE]);
2049 if (sl->frame_type > NL802154_FRAME_MAX ||
2050 (sl->device_override != 0 && sl->device_override != 1))
2051 return -EINVAL;
2052
2053 if (sl->frame_type == NL802154_FRAME_CMD) {
2054 if (!attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME])
2055 return -EINVAL;
2056
2057 sl->cmd_frame_id = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME]);
2058 if (sl->cmd_frame_id > NL802154_CMD_FRAME_MAX)
2059 return -EINVAL;
2060 }
2061
2062 return 0;
2063 }
2064
nl802154_add_llsec_seclevel(struct sk_buff * skb,struct genl_info * info)2065 static int nl802154_add_llsec_seclevel(struct sk_buff *skb,
2066 struct genl_info *info)
2067 {
2068 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2069 struct net_device *dev = info->user_ptr[1];
2070 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2071 struct ieee802154_llsec_seclevel sl;
2072
2073 if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2074 &sl) < 0)
2075 return -EINVAL;
2076
2077 return rdev_add_seclevel(rdev, wpan_dev, &sl);
2078 }
2079
nl802154_del_llsec_seclevel(struct sk_buff * skb,struct genl_info * info)2080 static int nl802154_del_llsec_seclevel(struct sk_buff *skb,
2081 struct genl_info *info)
2082 {
2083 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2084 struct net_device *dev = info->user_ptr[1];
2085 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2086 struct ieee802154_llsec_seclevel sl;
2087
2088 if (!info->attrs[NL802154_ATTR_SEC_LEVEL] ||
2089 llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2090 &sl) < 0)
2091 return -EINVAL;
2092
2093 return rdev_del_seclevel(rdev, wpan_dev, &sl);
2094 }
2095 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2096
2097 #define NL802154_FLAG_NEED_WPAN_PHY 0x01
2098 #define NL802154_FLAG_NEED_NETDEV 0x02
2099 #define NL802154_FLAG_NEED_RTNL 0x04
2100 #define NL802154_FLAG_CHECK_NETDEV_UP 0x08
2101 #define NL802154_FLAG_NEED_NETDEV_UP (NL802154_FLAG_NEED_NETDEV |\
2102 NL802154_FLAG_CHECK_NETDEV_UP)
2103 #define NL802154_FLAG_NEED_WPAN_DEV 0x10
2104 #define NL802154_FLAG_NEED_WPAN_DEV_UP (NL802154_FLAG_NEED_WPAN_DEV |\
2105 NL802154_FLAG_CHECK_NETDEV_UP)
2106
nl802154_pre_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)2107 static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
2108 struct genl_info *info)
2109 {
2110 struct cfg802154_registered_device *rdev;
2111 struct wpan_dev *wpan_dev;
2112 struct net_device *dev;
2113 bool rtnl = ops->internal_flags & NL802154_FLAG_NEED_RTNL;
2114
2115 if (rtnl)
2116 rtnl_lock();
2117
2118 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_PHY) {
2119 rdev = cfg802154_get_dev_from_info(genl_info_net(info), info);
2120 if (IS_ERR(rdev)) {
2121 if (rtnl)
2122 rtnl_unlock();
2123 return PTR_ERR(rdev);
2124 }
2125 info->user_ptr[0] = rdev;
2126 } else if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV ||
2127 ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2128 ASSERT_RTNL();
2129 wpan_dev = __cfg802154_wpan_dev_from_attrs(genl_info_net(info),
2130 info->attrs);
2131 if (IS_ERR(wpan_dev)) {
2132 if (rtnl)
2133 rtnl_unlock();
2134 return PTR_ERR(wpan_dev);
2135 }
2136
2137 dev = wpan_dev->netdev;
2138 rdev = wpan_phy_to_rdev(wpan_dev->wpan_phy);
2139
2140 if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV) {
2141 if (!dev) {
2142 if (rtnl)
2143 rtnl_unlock();
2144 return -EINVAL;
2145 }
2146
2147 info->user_ptr[1] = dev;
2148 } else {
2149 info->user_ptr[1] = wpan_dev;
2150 }
2151
2152 if (dev) {
2153 if (ops->internal_flags & NL802154_FLAG_CHECK_NETDEV_UP &&
2154 !netif_running(dev)) {
2155 if (rtnl)
2156 rtnl_unlock();
2157 return -ENETDOWN;
2158 }
2159
2160 dev_hold(dev);
2161 }
2162
2163 info->user_ptr[0] = rdev;
2164 }
2165
2166 return 0;
2167 }
2168
nl802154_post_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)2169 static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
2170 struct genl_info *info)
2171 {
2172 if (info->user_ptr[1]) {
2173 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2174 struct wpan_dev *wpan_dev = info->user_ptr[1];
2175
2176 if (wpan_dev->netdev)
2177 dev_put(wpan_dev->netdev);
2178 } else {
2179 dev_put(info->user_ptr[1]);
2180 }
2181 }
2182
2183 if (ops->internal_flags & NL802154_FLAG_NEED_RTNL)
2184 rtnl_unlock();
2185 }
2186
2187 static const struct genl_ops nl802154_ops[] = {
2188 {
2189 .cmd = NL802154_CMD_GET_WPAN_PHY,
2190 .validate = GENL_DONT_VALIDATE_STRICT |
2191 GENL_DONT_VALIDATE_DUMP_STRICT,
2192 .doit = nl802154_get_wpan_phy,
2193 .dumpit = nl802154_dump_wpan_phy,
2194 .done = nl802154_dump_wpan_phy_done,
2195 /* can be retrieved by unprivileged users */
2196 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2197 NL802154_FLAG_NEED_RTNL,
2198 },
2199 {
2200 .cmd = NL802154_CMD_GET_INTERFACE,
2201 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2202 .doit = nl802154_get_interface,
2203 .dumpit = nl802154_dump_interface,
2204 /* can be retrieved by unprivileged users */
2205 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2206 NL802154_FLAG_NEED_RTNL,
2207 },
2208 {
2209 .cmd = NL802154_CMD_NEW_INTERFACE,
2210 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2211 .doit = nl802154_new_interface,
2212 .flags = GENL_ADMIN_PERM,
2213 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2214 NL802154_FLAG_NEED_RTNL,
2215 },
2216 {
2217 .cmd = NL802154_CMD_DEL_INTERFACE,
2218 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2219 .doit = nl802154_del_interface,
2220 .flags = GENL_ADMIN_PERM,
2221 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2222 NL802154_FLAG_NEED_RTNL,
2223 },
2224 {
2225 .cmd = NL802154_CMD_SET_CHANNEL,
2226 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2227 .doit = nl802154_set_channel,
2228 .flags = GENL_ADMIN_PERM,
2229 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2230 NL802154_FLAG_NEED_RTNL,
2231 },
2232 {
2233 .cmd = NL802154_CMD_SET_CCA_MODE,
2234 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2235 .doit = nl802154_set_cca_mode,
2236 .flags = GENL_ADMIN_PERM,
2237 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2238 NL802154_FLAG_NEED_RTNL,
2239 },
2240 {
2241 .cmd = NL802154_CMD_SET_CCA_ED_LEVEL,
2242 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2243 .doit = nl802154_set_cca_ed_level,
2244 .flags = GENL_ADMIN_PERM,
2245 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2246 NL802154_FLAG_NEED_RTNL,
2247 },
2248 {
2249 .cmd = NL802154_CMD_SET_TX_POWER,
2250 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2251 .doit = nl802154_set_tx_power,
2252 .flags = GENL_ADMIN_PERM,
2253 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2254 NL802154_FLAG_NEED_RTNL,
2255 },
2256 {
2257 .cmd = NL802154_CMD_SET_WPAN_PHY_NETNS,
2258 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2259 .doit = nl802154_wpan_phy_netns,
2260 .flags = GENL_ADMIN_PERM,
2261 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2262 NL802154_FLAG_NEED_RTNL,
2263 },
2264 {
2265 .cmd = NL802154_CMD_SET_PAN_ID,
2266 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2267 .doit = nl802154_set_pan_id,
2268 .flags = GENL_ADMIN_PERM,
2269 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2270 NL802154_FLAG_NEED_RTNL,
2271 },
2272 {
2273 .cmd = NL802154_CMD_SET_SHORT_ADDR,
2274 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2275 .doit = nl802154_set_short_addr,
2276 .flags = GENL_ADMIN_PERM,
2277 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2278 NL802154_FLAG_NEED_RTNL,
2279 },
2280 {
2281 .cmd = NL802154_CMD_SET_BACKOFF_EXPONENT,
2282 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2283 .doit = nl802154_set_backoff_exponent,
2284 .flags = GENL_ADMIN_PERM,
2285 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2286 NL802154_FLAG_NEED_RTNL,
2287 },
2288 {
2289 .cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,
2290 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2291 .doit = nl802154_set_max_csma_backoffs,
2292 .flags = GENL_ADMIN_PERM,
2293 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2294 NL802154_FLAG_NEED_RTNL,
2295 },
2296 {
2297 .cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES,
2298 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2299 .doit = nl802154_set_max_frame_retries,
2300 .flags = GENL_ADMIN_PERM,
2301 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2302 NL802154_FLAG_NEED_RTNL,
2303 },
2304 {
2305 .cmd = NL802154_CMD_SET_LBT_MODE,
2306 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2307 .doit = nl802154_set_lbt_mode,
2308 .flags = GENL_ADMIN_PERM,
2309 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2310 NL802154_FLAG_NEED_RTNL,
2311 },
2312 {
2313 .cmd = NL802154_CMD_SET_ACKREQ_DEFAULT,
2314 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2315 .doit = nl802154_set_ackreq_default,
2316 .flags = GENL_ADMIN_PERM,
2317 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2318 NL802154_FLAG_NEED_RTNL,
2319 },
2320 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
2321 {
2322 .cmd = NL802154_CMD_SET_SEC_PARAMS,
2323 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2324 .doit = nl802154_set_llsec_params,
2325 .flags = GENL_ADMIN_PERM,
2326 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2327 NL802154_FLAG_NEED_RTNL,
2328 },
2329 {
2330 .cmd = NL802154_CMD_GET_SEC_KEY,
2331 .validate = GENL_DONT_VALIDATE_STRICT |
2332 GENL_DONT_VALIDATE_DUMP_STRICT,
2333 /* TODO .doit by matching key id? */
2334 .dumpit = nl802154_dump_llsec_key,
2335 .flags = GENL_ADMIN_PERM,
2336 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2337 NL802154_FLAG_NEED_RTNL,
2338 },
2339 {
2340 .cmd = NL802154_CMD_NEW_SEC_KEY,
2341 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2342 .doit = nl802154_add_llsec_key,
2343 .flags = GENL_ADMIN_PERM,
2344 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2345 NL802154_FLAG_NEED_RTNL,
2346 },
2347 {
2348 .cmd = NL802154_CMD_DEL_SEC_KEY,
2349 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2350 .doit = nl802154_del_llsec_key,
2351 .flags = GENL_ADMIN_PERM,
2352 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2353 NL802154_FLAG_NEED_RTNL,
2354 },
2355 /* TODO unique identifier must short+pan OR extended_addr */
2356 {
2357 .cmd = NL802154_CMD_GET_SEC_DEV,
2358 .validate = GENL_DONT_VALIDATE_STRICT |
2359 GENL_DONT_VALIDATE_DUMP_STRICT,
2360 /* TODO .doit by matching extended_addr? */
2361 .dumpit = nl802154_dump_llsec_dev,
2362 .flags = GENL_ADMIN_PERM,
2363 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2364 NL802154_FLAG_NEED_RTNL,
2365 },
2366 {
2367 .cmd = NL802154_CMD_NEW_SEC_DEV,
2368 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2369 .doit = nl802154_add_llsec_dev,
2370 .flags = GENL_ADMIN_PERM,
2371 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2372 NL802154_FLAG_NEED_RTNL,
2373 },
2374 {
2375 .cmd = NL802154_CMD_DEL_SEC_DEV,
2376 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2377 .doit = nl802154_del_llsec_dev,
2378 .flags = GENL_ADMIN_PERM,
2379 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2380 NL802154_FLAG_NEED_RTNL,
2381 },
2382 /* TODO remove complete devkey, put it as nested? */
2383 {
2384 .cmd = NL802154_CMD_GET_SEC_DEVKEY,
2385 .validate = GENL_DONT_VALIDATE_STRICT |
2386 GENL_DONT_VALIDATE_DUMP_STRICT,
2387 /* TODO doit by matching ??? */
2388 .dumpit = nl802154_dump_llsec_devkey,
2389 .flags = GENL_ADMIN_PERM,
2390 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2391 NL802154_FLAG_NEED_RTNL,
2392 },
2393 {
2394 .cmd = NL802154_CMD_NEW_SEC_DEVKEY,
2395 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2396 .doit = nl802154_add_llsec_devkey,
2397 .flags = GENL_ADMIN_PERM,
2398 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2399 NL802154_FLAG_NEED_RTNL,
2400 },
2401 {
2402 .cmd = NL802154_CMD_DEL_SEC_DEVKEY,
2403 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2404 .doit = nl802154_del_llsec_devkey,
2405 .flags = GENL_ADMIN_PERM,
2406 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2407 NL802154_FLAG_NEED_RTNL,
2408 },
2409 {
2410 .cmd = NL802154_CMD_GET_SEC_LEVEL,
2411 .validate = GENL_DONT_VALIDATE_STRICT |
2412 GENL_DONT_VALIDATE_DUMP_STRICT,
2413 /* TODO .doit by matching frame_type? */
2414 .dumpit = nl802154_dump_llsec_seclevel,
2415 .flags = GENL_ADMIN_PERM,
2416 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2417 NL802154_FLAG_NEED_RTNL,
2418 },
2419 {
2420 .cmd = NL802154_CMD_NEW_SEC_LEVEL,
2421 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2422 .doit = nl802154_add_llsec_seclevel,
2423 .flags = GENL_ADMIN_PERM,
2424 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2425 NL802154_FLAG_NEED_RTNL,
2426 },
2427 {
2428 .cmd = NL802154_CMD_DEL_SEC_LEVEL,
2429 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2430 /* TODO match frame_type only? */
2431 .doit = nl802154_del_llsec_seclevel,
2432 .flags = GENL_ADMIN_PERM,
2433 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2434 NL802154_FLAG_NEED_RTNL,
2435 },
2436 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2437 };
2438
2439 static struct genl_family nl802154_fam __ro_after_init = {
2440 .name = NL802154_GENL_NAME, /* have users key off the name instead */
2441 .hdrsize = 0, /* no private header */
2442 .version = 1, /* no particular meaning now */
2443 .maxattr = NL802154_ATTR_MAX,
2444 .policy = nl802154_policy,
2445 .netnsok = true,
2446 .pre_doit = nl802154_pre_doit,
2447 .post_doit = nl802154_post_doit,
2448 .module = THIS_MODULE,
2449 .ops = nl802154_ops,
2450 .n_ops = ARRAY_SIZE(nl802154_ops),
2451 .mcgrps = nl802154_mcgrps,
2452 .n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
2453 };
2454
2455 /* initialisation/exit functions */
nl802154_init(void)2456 int __init nl802154_init(void)
2457 {
2458 return genl_register_family(&nl802154_fam);
2459 }
2460
nl802154_exit(void)2461 void nl802154_exit(void)
2462 {
2463 genl_unregister_family(&nl802154_fam);
2464 }
2465
