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 (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
824 goto out;
825
826 if (nl802154_get_llsec_params(msg, rdev, wpan_dev) < 0)
827 goto nla_put_failure;
828
829 out:
830 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
831
832 genlmsg_end(msg, hdr);
833 return 0;
834
835 nla_put_failure:
836 genlmsg_cancel(msg, hdr);
837 return -EMSGSIZE;
838 }
839
840 static int
nl802154_dump_interface(struct sk_buff * skb,struct netlink_callback * cb)841 nl802154_dump_interface(struct sk_buff *skb, struct netlink_callback *cb)
842 {
843 int wp_idx = 0;
844 int if_idx = 0;
845 int wp_start = cb->args[0];
846 int if_start = cb->args[1];
847 struct cfg802154_registered_device *rdev;
848 struct wpan_dev *wpan_dev;
849
850 rtnl_lock();
851 list_for_each_entry(rdev, &cfg802154_rdev_list, list) {
852 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), sock_net(skb->sk)))
853 continue;
854 if (wp_idx < wp_start) {
855 wp_idx++;
856 continue;
857 }
858 if_idx = 0;
859
860 list_for_each_entry(wpan_dev, &rdev->wpan_dev_list, list) {
861 if (if_idx < if_start) {
862 if_idx++;
863 continue;
864 }
865 if (nl802154_send_iface(skb, NETLINK_CB(cb->skb).portid,
866 cb->nlh->nlmsg_seq, NLM_F_MULTI,
867 rdev, wpan_dev) < 0) {
868 goto out;
869 }
870 if_idx++;
871 }
872
873 wp_idx++;
874 }
875 out:
876 rtnl_unlock();
877
878 cb->args[0] = wp_idx;
879 cb->args[1] = if_idx;
880
881 return skb->len;
882 }
883
nl802154_get_interface(struct sk_buff * skb,struct genl_info * info)884 static int nl802154_get_interface(struct sk_buff *skb, struct genl_info *info)
885 {
886 struct sk_buff *msg;
887 struct cfg802154_registered_device *rdev = info->user_ptr[0];
888 struct wpan_dev *wdev = info->user_ptr[1];
889
890 msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
891 if (!msg)
892 return -ENOMEM;
893
894 if (nl802154_send_iface(msg, info->snd_portid, info->snd_seq, 0,
895 rdev, wdev) < 0) {
896 nlmsg_free(msg);
897 return -ENOBUFS;
898 }
899
900 return genlmsg_reply(msg, info);
901 }
902
nl802154_new_interface(struct sk_buff * skb,struct genl_info * info)903 static int nl802154_new_interface(struct sk_buff *skb, struct genl_info *info)
904 {
905 struct cfg802154_registered_device *rdev = info->user_ptr[0];
906 enum nl802154_iftype type = NL802154_IFTYPE_UNSPEC;
907 __le64 extended_addr = cpu_to_le64(0x0000000000000000ULL);
908
909 /* TODO avoid failing a new interface
910 * creation due to pending removal?
911 */
912
913 if (!info->attrs[NL802154_ATTR_IFNAME])
914 return -EINVAL;
915
916 if (info->attrs[NL802154_ATTR_IFTYPE]) {
917 type = nla_get_u32(info->attrs[NL802154_ATTR_IFTYPE]);
918 if (type > NL802154_IFTYPE_MAX ||
919 !(rdev->wpan_phy.supported.iftypes & BIT(type)))
920 return -EINVAL;
921 }
922
923 if (info->attrs[NL802154_ATTR_EXTENDED_ADDR])
924 extended_addr = nla_get_le64(info->attrs[NL802154_ATTR_EXTENDED_ADDR]);
925
926 if (!rdev->ops->add_virtual_intf)
927 return -EOPNOTSUPP;
928
929 return rdev_add_virtual_intf(rdev,
930 nla_data(info->attrs[NL802154_ATTR_IFNAME]),
931 NET_NAME_USER, type, extended_addr);
932 }
933
nl802154_del_interface(struct sk_buff * skb,struct genl_info * info)934 static int nl802154_del_interface(struct sk_buff *skb, struct genl_info *info)
935 {
936 struct cfg802154_registered_device *rdev = info->user_ptr[0];
937 struct wpan_dev *wpan_dev = info->user_ptr[1];
938
939 if (!rdev->ops->del_virtual_intf)
940 return -EOPNOTSUPP;
941
942 /* If we remove a wpan device without a netdev then clear
943 * user_ptr[1] so that nl802154_post_doit won't dereference it
944 * to check if it needs to do dev_put(). Otherwise it crashes
945 * since the wpan_dev has been freed, unlike with a netdev where
946 * we need the dev_put() for the netdev to really be freed.
947 */
948 if (!wpan_dev->netdev)
949 info->user_ptr[1] = NULL;
950
951 return rdev_del_virtual_intf(rdev, wpan_dev);
952 }
953
nl802154_set_channel(struct sk_buff * skb,struct genl_info * info)954 static int nl802154_set_channel(struct sk_buff *skb, struct genl_info *info)
955 {
956 struct cfg802154_registered_device *rdev = info->user_ptr[0];
957 u8 channel, page;
958
959 if (!info->attrs[NL802154_ATTR_PAGE] ||
960 !info->attrs[NL802154_ATTR_CHANNEL])
961 return -EINVAL;
962
963 page = nla_get_u8(info->attrs[NL802154_ATTR_PAGE]);
964 channel = nla_get_u8(info->attrs[NL802154_ATTR_CHANNEL]);
965
966 /* check 802.15.4 constraints */
967 if (page > IEEE802154_MAX_PAGE || channel > IEEE802154_MAX_CHANNEL ||
968 !(rdev->wpan_phy.supported.channels[page] & BIT(channel)))
969 return -EINVAL;
970
971 return rdev_set_channel(rdev, page, channel);
972 }
973
nl802154_set_cca_mode(struct sk_buff * skb,struct genl_info * info)974 static int nl802154_set_cca_mode(struct sk_buff *skb, struct genl_info *info)
975 {
976 struct cfg802154_registered_device *rdev = info->user_ptr[0];
977 struct wpan_phy_cca cca;
978
979 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_MODE))
980 return -EOPNOTSUPP;
981
982 if (!info->attrs[NL802154_ATTR_CCA_MODE])
983 return -EINVAL;
984
985 cca.mode = nla_get_u32(info->attrs[NL802154_ATTR_CCA_MODE]);
986 /* checking 802.15.4 constraints */
987 if (cca.mode < NL802154_CCA_ENERGY ||
988 cca.mode > NL802154_CCA_ATTR_MAX ||
989 !(rdev->wpan_phy.supported.cca_modes & BIT(cca.mode)))
990 return -EINVAL;
991
992 if (cca.mode == NL802154_CCA_ENERGY_CARRIER) {
993 if (!info->attrs[NL802154_ATTR_CCA_OPT])
994 return -EINVAL;
995
996 cca.opt = nla_get_u32(info->attrs[NL802154_ATTR_CCA_OPT]);
997 if (cca.opt > NL802154_CCA_OPT_ATTR_MAX ||
998 !(rdev->wpan_phy.supported.cca_opts & BIT(cca.opt)))
999 return -EINVAL;
1000 }
1001
1002 return rdev_set_cca_mode(rdev, &cca);
1003 }
1004
nl802154_set_cca_ed_level(struct sk_buff * skb,struct genl_info * info)1005 static int nl802154_set_cca_ed_level(struct sk_buff *skb, struct genl_info *info)
1006 {
1007 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1008 s32 ed_level;
1009 int i;
1010
1011 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_CCA_ED_LEVEL))
1012 return -EOPNOTSUPP;
1013
1014 if (!info->attrs[NL802154_ATTR_CCA_ED_LEVEL])
1015 return -EINVAL;
1016
1017 ed_level = nla_get_s32(info->attrs[NL802154_ATTR_CCA_ED_LEVEL]);
1018
1019 for (i = 0; i < rdev->wpan_phy.supported.cca_ed_levels_size; i++) {
1020 if (ed_level == rdev->wpan_phy.supported.cca_ed_levels[i])
1021 return rdev_set_cca_ed_level(rdev, ed_level);
1022 }
1023
1024 return -EINVAL;
1025 }
1026
nl802154_set_tx_power(struct sk_buff * skb,struct genl_info * info)1027 static int nl802154_set_tx_power(struct sk_buff *skb, struct genl_info *info)
1028 {
1029 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1030 s32 power;
1031 int i;
1032
1033 if (!(rdev->wpan_phy.flags & WPAN_PHY_FLAG_TXPOWER))
1034 return -EOPNOTSUPP;
1035
1036 if (!info->attrs[NL802154_ATTR_TX_POWER])
1037 return -EINVAL;
1038
1039 power = nla_get_s32(info->attrs[NL802154_ATTR_TX_POWER]);
1040
1041 for (i = 0; i < rdev->wpan_phy.supported.tx_powers_size; i++) {
1042 if (power == rdev->wpan_phy.supported.tx_powers[i])
1043 return rdev_set_tx_power(rdev, power);
1044 }
1045
1046 return -EINVAL;
1047 }
1048
nl802154_set_pan_id(struct sk_buff * skb,struct genl_info * info)1049 static int nl802154_set_pan_id(struct sk_buff *skb, struct genl_info *info)
1050 {
1051 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1052 struct net_device *dev = info->user_ptr[1];
1053 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1054 __le16 pan_id;
1055
1056 /* conflict here while tx/rx calls */
1057 if (netif_running(dev))
1058 return -EBUSY;
1059
1060 if (wpan_dev->lowpan_dev) {
1061 if (netif_running(wpan_dev->lowpan_dev))
1062 return -EBUSY;
1063 }
1064
1065 /* don't change address fields on monitor */
1066 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1067 !info->attrs[NL802154_ATTR_PAN_ID])
1068 return -EINVAL;
1069
1070 pan_id = nla_get_le16(info->attrs[NL802154_ATTR_PAN_ID]);
1071
1072 /* TODO
1073 * I am not sure about to check here on broadcast pan_id.
1074 * Broadcast is a valid setting, comment from 802.15.4:
1075 * If this value is 0xffff, the device is not associated.
1076 *
1077 * This could useful to simple deassociate an device.
1078 */
1079 if (pan_id == cpu_to_le16(IEEE802154_PAN_ID_BROADCAST))
1080 return -EINVAL;
1081
1082 return rdev_set_pan_id(rdev, wpan_dev, pan_id);
1083 }
1084
nl802154_set_short_addr(struct sk_buff * skb,struct genl_info * info)1085 static int nl802154_set_short_addr(struct sk_buff *skb, struct genl_info *info)
1086 {
1087 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1088 struct net_device *dev = info->user_ptr[1];
1089 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1090 __le16 short_addr;
1091
1092 /* conflict here while tx/rx calls */
1093 if (netif_running(dev))
1094 return -EBUSY;
1095
1096 if (wpan_dev->lowpan_dev) {
1097 if (netif_running(wpan_dev->lowpan_dev))
1098 return -EBUSY;
1099 }
1100
1101 /* don't change address fields on monitor */
1102 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR ||
1103 !info->attrs[NL802154_ATTR_SHORT_ADDR])
1104 return -EINVAL;
1105
1106 short_addr = nla_get_le16(info->attrs[NL802154_ATTR_SHORT_ADDR]);
1107
1108 /* TODO
1109 * I am not sure about to check here on broadcast short_addr.
1110 * Broadcast is a valid setting, comment from 802.15.4:
1111 * A value of 0xfffe indicates that the device has
1112 * associated but has not been allocated an address. A
1113 * value of 0xffff indicates that the device does not
1114 * have a short address.
1115 *
1116 * I think we should allow to set these settings but
1117 * don't allow to allow socket communication with it.
1118 */
1119 if (short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC) ||
1120 short_addr == cpu_to_le16(IEEE802154_ADDR_SHORT_BROADCAST))
1121 return -EINVAL;
1122
1123 return rdev_set_short_addr(rdev, wpan_dev, short_addr);
1124 }
1125
1126 static int
nl802154_set_backoff_exponent(struct sk_buff * skb,struct genl_info * info)1127 nl802154_set_backoff_exponent(struct sk_buff *skb, struct genl_info *info)
1128 {
1129 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1130 struct net_device *dev = info->user_ptr[1];
1131 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1132 u8 min_be, max_be;
1133
1134 /* should be set on netif open inside phy settings */
1135 if (netif_running(dev))
1136 return -EBUSY;
1137
1138 if (!info->attrs[NL802154_ATTR_MIN_BE] ||
1139 !info->attrs[NL802154_ATTR_MAX_BE])
1140 return -EINVAL;
1141
1142 min_be = nla_get_u8(info->attrs[NL802154_ATTR_MIN_BE]);
1143 max_be = nla_get_u8(info->attrs[NL802154_ATTR_MAX_BE]);
1144
1145 /* check 802.15.4 constraints */
1146 if (min_be < rdev->wpan_phy.supported.min_minbe ||
1147 min_be > rdev->wpan_phy.supported.max_minbe ||
1148 max_be < rdev->wpan_phy.supported.min_maxbe ||
1149 max_be > rdev->wpan_phy.supported.max_maxbe ||
1150 min_be > max_be)
1151 return -EINVAL;
1152
1153 return rdev_set_backoff_exponent(rdev, wpan_dev, min_be, max_be);
1154 }
1155
1156 static int
nl802154_set_max_csma_backoffs(struct sk_buff * skb,struct genl_info * info)1157 nl802154_set_max_csma_backoffs(struct sk_buff *skb, struct genl_info *info)
1158 {
1159 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1160 struct net_device *dev = info->user_ptr[1];
1161 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1162 u8 max_csma_backoffs;
1163
1164 /* conflict here while other running iface settings */
1165 if (netif_running(dev))
1166 return -EBUSY;
1167
1168 if (!info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS])
1169 return -EINVAL;
1170
1171 max_csma_backoffs = nla_get_u8(
1172 info->attrs[NL802154_ATTR_MAX_CSMA_BACKOFFS]);
1173
1174 /* check 802.15.4 constraints */
1175 if (max_csma_backoffs < rdev->wpan_phy.supported.min_csma_backoffs ||
1176 max_csma_backoffs > rdev->wpan_phy.supported.max_csma_backoffs)
1177 return -EINVAL;
1178
1179 return rdev_set_max_csma_backoffs(rdev, wpan_dev, max_csma_backoffs);
1180 }
1181
1182 static int
nl802154_set_max_frame_retries(struct sk_buff * skb,struct genl_info * info)1183 nl802154_set_max_frame_retries(struct sk_buff *skb, struct genl_info *info)
1184 {
1185 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1186 struct net_device *dev = info->user_ptr[1];
1187 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1188 s8 max_frame_retries;
1189
1190 if (netif_running(dev))
1191 return -EBUSY;
1192
1193 if (!info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES])
1194 return -EINVAL;
1195
1196 max_frame_retries = nla_get_s8(
1197 info->attrs[NL802154_ATTR_MAX_FRAME_RETRIES]);
1198
1199 /* check 802.15.4 constraints */
1200 if (max_frame_retries < rdev->wpan_phy.supported.min_frame_retries ||
1201 max_frame_retries > rdev->wpan_phy.supported.max_frame_retries)
1202 return -EINVAL;
1203
1204 return rdev_set_max_frame_retries(rdev, wpan_dev, max_frame_retries);
1205 }
1206
nl802154_set_lbt_mode(struct sk_buff * skb,struct genl_info * info)1207 static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
1208 {
1209 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1210 struct net_device *dev = info->user_ptr[1];
1211 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1212 int mode;
1213
1214 if (netif_running(dev))
1215 return -EBUSY;
1216
1217 if (!info->attrs[NL802154_ATTR_LBT_MODE])
1218 return -EINVAL;
1219
1220 mode = nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
1221
1222 if (mode != 0 && mode != 1)
1223 return -EINVAL;
1224
1225 if (!wpan_phy_supported_bool(mode, rdev->wpan_phy.supported.lbt))
1226 return -EINVAL;
1227
1228 return rdev_set_lbt_mode(rdev, wpan_dev, mode);
1229 }
1230
1231 static int
nl802154_set_ackreq_default(struct sk_buff * skb,struct genl_info * info)1232 nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
1233 {
1234 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1235 struct net_device *dev = info->user_ptr[1];
1236 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1237 int ackreq;
1238
1239 if (netif_running(dev))
1240 return -EBUSY;
1241
1242 if (!info->attrs[NL802154_ATTR_ACKREQ_DEFAULT])
1243 return -EINVAL;
1244
1245 ackreq = nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
1246
1247 if (ackreq != 0 && ackreq != 1)
1248 return -EINVAL;
1249
1250 return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
1251 }
1252
nl802154_wpan_phy_netns(struct sk_buff * skb,struct genl_info * info)1253 static int nl802154_wpan_phy_netns(struct sk_buff *skb, struct genl_info *info)
1254 {
1255 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1256 struct net *net;
1257 int err;
1258
1259 if (info->attrs[NL802154_ATTR_PID]) {
1260 u32 pid = nla_get_u32(info->attrs[NL802154_ATTR_PID]);
1261
1262 net = get_net_ns_by_pid(pid);
1263 } else if (info->attrs[NL802154_ATTR_NETNS_FD]) {
1264 u32 fd = nla_get_u32(info->attrs[NL802154_ATTR_NETNS_FD]);
1265
1266 net = get_net_ns_by_fd(fd);
1267 } else {
1268 return -EINVAL;
1269 }
1270
1271 if (IS_ERR(net))
1272 return PTR_ERR(net);
1273
1274 err = 0;
1275
1276 /* check if anything to do */
1277 if (!net_eq(wpan_phy_net(&rdev->wpan_phy), net))
1278 err = cfg802154_switch_netns(rdev, net);
1279
1280 put_net(net);
1281 return err;
1282 }
1283
1284 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
1285 static const struct nla_policy nl802154_dev_addr_policy[NL802154_DEV_ADDR_ATTR_MAX + 1] = {
1286 [NL802154_DEV_ADDR_ATTR_PAN_ID] = { .type = NLA_U16 },
1287 [NL802154_DEV_ADDR_ATTR_MODE] = { .type = NLA_U32 },
1288 [NL802154_DEV_ADDR_ATTR_SHORT] = { .type = NLA_U16 },
1289 [NL802154_DEV_ADDR_ATTR_EXTENDED] = { .type = NLA_U64 },
1290 };
1291
1292 static int
ieee802154_llsec_parse_dev_addr(struct nlattr * nla,struct ieee802154_addr * addr)1293 ieee802154_llsec_parse_dev_addr(struct nlattr *nla,
1294 struct ieee802154_addr *addr)
1295 {
1296 struct nlattr *attrs[NL802154_DEV_ADDR_ATTR_MAX + 1];
1297
1298 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_DEV_ADDR_ATTR_MAX, nla, nl802154_dev_addr_policy, NULL))
1299 return -EINVAL;
1300
1301 if (!attrs[NL802154_DEV_ADDR_ATTR_PAN_ID] || !attrs[NL802154_DEV_ADDR_ATTR_MODE])
1302 return -EINVAL;
1303
1304 addr->pan_id = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_PAN_ID]);
1305 addr->mode = nla_get_u32(attrs[NL802154_DEV_ADDR_ATTR_MODE]);
1306 switch (addr->mode) {
1307 case NL802154_DEV_ADDR_SHORT:
1308 if (!attrs[NL802154_DEV_ADDR_ATTR_SHORT])
1309 return -EINVAL;
1310 addr->short_addr = nla_get_le16(attrs[NL802154_DEV_ADDR_ATTR_SHORT]);
1311 break;
1312 case NL802154_DEV_ADDR_EXTENDED:
1313 if (!attrs[NL802154_DEV_ADDR_ATTR_EXTENDED])
1314 return -EINVAL;
1315 addr->extended_addr = nla_get_le64(attrs[NL802154_DEV_ADDR_ATTR_EXTENDED]);
1316 break;
1317 default:
1318 return -EINVAL;
1319 }
1320
1321 return 0;
1322 }
1323
1324 static const struct nla_policy nl802154_key_id_policy[NL802154_KEY_ID_ATTR_MAX + 1] = {
1325 [NL802154_KEY_ID_ATTR_MODE] = { .type = NLA_U32 },
1326 [NL802154_KEY_ID_ATTR_INDEX] = { .type = NLA_U8 },
1327 [NL802154_KEY_ID_ATTR_IMPLICIT] = { .type = NLA_NESTED },
1328 [NL802154_KEY_ID_ATTR_SOURCE_SHORT] = { .type = NLA_U32 },
1329 [NL802154_KEY_ID_ATTR_SOURCE_EXTENDED] = { .type = NLA_U64 },
1330 };
1331
1332 static int
ieee802154_llsec_parse_key_id(struct nlattr * nla,struct ieee802154_llsec_key_id * desc)1333 ieee802154_llsec_parse_key_id(struct nlattr *nla,
1334 struct ieee802154_llsec_key_id *desc)
1335 {
1336 struct nlattr *attrs[NL802154_KEY_ID_ATTR_MAX + 1];
1337
1338 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_KEY_ID_ATTR_MAX, nla, nl802154_key_id_policy, NULL))
1339 return -EINVAL;
1340
1341 if (!attrs[NL802154_KEY_ID_ATTR_MODE])
1342 return -EINVAL;
1343
1344 desc->mode = nla_get_u32(attrs[NL802154_KEY_ID_ATTR_MODE]);
1345 switch (desc->mode) {
1346 case NL802154_KEY_ID_MODE_IMPLICIT:
1347 if (!attrs[NL802154_KEY_ID_ATTR_IMPLICIT])
1348 return -EINVAL;
1349
1350 if (ieee802154_llsec_parse_dev_addr(attrs[NL802154_KEY_ID_ATTR_IMPLICIT],
1351 &desc->device_addr) < 0)
1352 return -EINVAL;
1353 break;
1354 case NL802154_KEY_ID_MODE_INDEX:
1355 break;
1356 case NL802154_KEY_ID_MODE_INDEX_SHORT:
1357 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT])
1358 return -EINVAL;
1359
1360 desc->short_source = nla_get_le32(attrs[NL802154_KEY_ID_ATTR_SOURCE_SHORT]);
1361 break;
1362 case NL802154_KEY_ID_MODE_INDEX_EXTENDED:
1363 if (!attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED])
1364 return -EINVAL;
1365
1366 desc->extended_source = nla_get_le64(attrs[NL802154_KEY_ID_ATTR_SOURCE_EXTENDED]);
1367 break;
1368 default:
1369 return -EINVAL;
1370 }
1371
1372 if (desc->mode != NL802154_KEY_ID_MODE_IMPLICIT) {
1373 if (!attrs[NL802154_KEY_ID_ATTR_INDEX])
1374 return -EINVAL;
1375
1376 /* TODO change id to idx */
1377 desc->id = nla_get_u8(attrs[NL802154_KEY_ID_ATTR_INDEX]);
1378 }
1379
1380 return 0;
1381 }
1382
nl802154_set_llsec_params(struct sk_buff * skb,struct genl_info * info)1383 static int nl802154_set_llsec_params(struct sk_buff *skb,
1384 struct genl_info *info)
1385 {
1386 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1387 struct net_device *dev = info->user_ptr[1];
1388 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1389 struct ieee802154_llsec_params params;
1390 u32 changed = 0;
1391 int ret;
1392
1393 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1394 return -EOPNOTSUPP;
1395
1396 if (info->attrs[NL802154_ATTR_SEC_ENABLED]) {
1397 u8 enabled;
1398
1399 enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1400 if (enabled != 0 && enabled != 1)
1401 return -EINVAL;
1402
1403 params.enabled = nla_get_u8(info->attrs[NL802154_ATTR_SEC_ENABLED]);
1404 changed |= IEEE802154_LLSEC_PARAM_ENABLED;
1405 }
1406
1407 if (info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID]) {
1408 ret = ieee802154_llsec_parse_key_id(info->attrs[NL802154_ATTR_SEC_OUT_KEY_ID],
1409 ¶ms.out_key);
1410 if (ret < 0)
1411 return ret;
1412
1413 changed |= IEEE802154_LLSEC_PARAM_OUT_KEY;
1414 }
1415
1416 if (info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]) {
1417 params.out_level = nla_get_u32(info->attrs[NL802154_ATTR_SEC_OUT_LEVEL]);
1418 if (params.out_level > NL802154_SECLEVEL_MAX)
1419 return -EINVAL;
1420
1421 changed |= IEEE802154_LLSEC_PARAM_OUT_LEVEL;
1422 }
1423
1424 if (info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]) {
1425 params.frame_counter = nla_get_be32(info->attrs[NL802154_ATTR_SEC_FRAME_COUNTER]);
1426 changed |= IEEE802154_LLSEC_PARAM_FRAME_COUNTER;
1427 }
1428
1429 return rdev_set_llsec_params(rdev, wpan_dev, ¶ms, changed);
1430 }
1431
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)1432 static int nl802154_send_key(struct sk_buff *msg, u32 cmd, u32 portid,
1433 u32 seq, int flags,
1434 struct cfg802154_registered_device *rdev,
1435 struct net_device *dev,
1436 const struct ieee802154_llsec_key_entry *key)
1437 {
1438 void *hdr;
1439 u32 commands[NL802154_CMD_FRAME_NR_IDS / 32];
1440 struct nlattr *nl_key, *nl_key_id;
1441
1442 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1443 if (!hdr)
1444 return -ENOBUFS;
1445
1446 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1447 goto nla_put_failure;
1448
1449 nl_key = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_KEY);
1450 if (!nl_key)
1451 goto nla_put_failure;
1452
1453 nl_key_id = nla_nest_start_noflag(msg, NL802154_KEY_ATTR_ID);
1454 if (!nl_key_id)
1455 goto nla_put_failure;
1456
1457 if (ieee802154_llsec_send_key_id(msg, &key->id) < 0)
1458 goto nla_put_failure;
1459
1460 nla_nest_end(msg, nl_key_id);
1461
1462 if (nla_put_u8(msg, NL802154_KEY_ATTR_USAGE_FRAMES,
1463 key->key->frame_types))
1464 goto nla_put_failure;
1465
1466 if (key->key->frame_types & BIT(NL802154_FRAME_CMD)) {
1467 /* TODO for each nested */
1468 memset(commands, 0, sizeof(commands));
1469 commands[7] = key->key->cmd_frame_ids;
1470 if (nla_put(msg, NL802154_KEY_ATTR_USAGE_CMDS,
1471 sizeof(commands), commands))
1472 goto nla_put_failure;
1473 }
1474
1475 if (nla_put(msg, NL802154_KEY_ATTR_BYTES, NL802154_KEY_SIZE,
1476 key->key->key))
1477 goto nla_put_failure;
1478
1479 nla_nest_end(msg, nl_key);
1480 genlmsg_end(msg, hdr);
1481
1482 return 0;
1483
1484 nla_put_failure:
1485 genlmsg_cancel(msg, hdr);
1486 return -EMSGSIZE;
1487 }
1488
1489 static int
nl802154_dump_llsec_key(struct sk_buff * skb,struct netlink_callback * cb)1490 nl802154_dump_llsec_key(struct sk_buff *skb, struct netlink_callback *cb)
1491 {
1492 struct cfg802154_registered_device *rdev = NULL;
1493 struct ieee802154_llsec_key_entry *key;
1494 struct ieee802154_llsec_table *table;
1495 struct wpan_dev *wpan_dev;
1496 int err;
1497
1498 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1499 if (err)
1500 return err;
1501
1502 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
1503 err = skb->len;
1504 goto out_err;
1505 }
1506
1507 if (!wpan_dev->netdev) {
1508 err = -EINVAL;
1509 goto out_err;
1510 }
1511
1512 rdev_lock_llsec_table(rdev, wpan_dev);
1513 rdev_get_llsec_table(rdev, wpan_dev, &table);
1514
1515 /* TODO make it like station dump */
1516 if (cb->args[2])
1517 goto out;
1518
1519 list_for_each_entry(key, &table->keys, list) {
1520 if (nl802154_send_key(skb, NL802154_CMD_NEW_SEC_KEY,
1521 NETLINK_CB(cb->skb).portid,
1522 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1523 rdev, wpan_dev->netdev, key) < 0) {
1524 /* TODO */
1525 err = -EIO;
1526 rdev_unlock_llsec_table(rdev, wpan_dev);
1527 goto out_err;
1528 }
1529 }
1530
1531 cb->args[2] = 1;
1532
1533 out:
1534 rdev_unlock_llsec_table(rdev, wpan_dev);
1535 err = skb->len;
1536 out_err:
1537 nl802154_finish_wpan_dev_dump(rdev);
1538
1539 return err;
1540 }
1541
1542 static const struct nla_policy nl802154_key_policy[NL802154_KEY_ATTR_MAX + 1] = {
1543 [NL802154_KEY_ATTR_ID] = { NLA_NESTED },
1544 /* TODO handle it as for_each_nested and NLA_FLAG? */
1545 [NL802154_KEY_ATTR_USAGE_FRAMES] = { NLA_U8 },
1546 /* TODO handle it as for_each_nested, not static array? */
1547 [NL802154_KEY_ATTR_USAGE_CMDS] = { .len = NL802154_CMD_FRAME_NR_IDS / 8 },
1548 [NL802154_KEY_ATTR_BYTES] = { .len = NL802154_KEY_SIZE },
1549 };
1550
nl802154_add_llsec_key(struct sk_buff * skb,struct genl_info * info)1551 static int nl802154_add_llsec_key(struct sk_buff *skb, struct genl_info *info)
1552 {
1553 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1554 struct net_device *dev = info->user_ptr[1];
1555 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1556 struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
1557 struct ieee802154_llsec_key key = { };
1558 struct ieee802154_llsec_key_id id = { };
1559 u32 commands[NL802154_CMD_FRAME_NR_IDS / 32] = { };
1560
1561 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1562 return -EOPNOTSUPP;
1563
1564 if (!info->attrs[NL802154_ATTR_SEC_KEY] ||
1565 nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack))
1566 return -EINVAL;
1567
1568 if (!attrs[NL802154_KEY_ATTR_USAGE_FRAMES] ||
1569 !attrs[NL802154_KEY_ATTR_BYTES])
1570 return -EINVAL;
1571
1572 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1573 return -ENOBUFS;
1574
1575 key.frame_types = nla_get_u8(attrs[NL802154_KEY_ATTR_USAGE_FRAMES]);
1576 if (key.frame_types > BIT(NL802154_FRAME_MAX) ||
1577 ((key.frame_types & BIT(NL802154_FRAME_CMD)) &&
1578 !attrs[NL802154_KEY_ATTR_USAGE_CMDS]))
1579 return -EINVAL;
1580
1581 if (attrs[NL802154_KEY_ATTR_USAGE_CMDS]) {
1582 /* TODO for each nested */
1583 nla_memcpy(commands, attrs[NL802154_KEY_ATTR_USAGE_CMDS],
1584 NL802154_CMD_FRAME_NR_IDS / 8);
1585
1586 /* TODO understand the -EINVAL logic here? last condition */
1587 if (commands[0] || commands[1] || commands[2] || commands[3] ||
1588 commands[4] || commands[5] || commands[6] ||
1589 commands[7] > BIT(NL802154_CMD_FRAME_MAX))
1590 return -EINVAL;
1591
1592 key.cmd_frame_ids = commands[7];
1593 } else {
1594 key.cmd_frame_ids = 0;
1595 }
1596
1597 nla_memcpy(key.key, attrs[NL802154_KEY_ATTR_BYTES], NL802154_KEY_SIZE);
1598
1599 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1600 return -ENOBUFS;
1601
1602 return rdev_add_llsec_key(rdev, wpan_dev, &id, &key);
1603 }
1604
nl802154_del_llsec_key(struct sk_buff * skb,struct genl_info * info)1605 static int nl802154_del_llsec_key(struct sk_buff *skb, struct genl_info *info)
1606 {
1607 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1608 struct net_device *dev = info->user_ptr[1];
1609 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1610 struct nlattr *attrs[NL802154_KEY_ATTR_MAX + 1];
1611 struct ieee802154_llsec_key_id id;
1612
1613 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1614 return -EOPNOTSUPP;
1615
1616 if (!info->attrs[NL802154_ATTR_SEC_KEY] ||
1617 nla_parse_nested_deprecated(attrs, NL802154_KEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_KEY], nl802154_key_policy, info->extack))
1618 return -EINVAL;
1619
1620 if (ieee802154_llsec_parse_key_id(attrs[NL802154_KEY_ATTR_ID], &id) < 0)
1621 return -ENOBUFS;
1622
1623 return rdev_del_llsec_key(rdev, wpan_dev, &id);
1624 }
1625
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)1626 static int nl802154_send_device(struct sk_buff *msg, u32 cmd, u32 portid,
1627 u32 seq, int flags,
1628 struct cfg802154_registered_device *rdev,
1629 struct net_device *dev,
1630 const struct ieee802154_llsec_device *dev_desc)
1631 {
1632 void *hdr;
1633 struct nlattr *nl_device;
1634
1635 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1636 if (!hdr)
1637 return -ENOBUFS;
1638
1639 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1640 goto nla_put_failure;
1641
1642 nl_device = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_DEVICE);
1643 if (!nl_device)
1644 goto nla_put_failure;
1645
1646 if (nla_put_u32(msg, NL802154_DEV_ATTR_FRAME_COUNTER,
1647 dev_desc->frame_counter) ||
1648 nla_put_le16(msg, NL802154_DEV_ATTR_PAN_ID, dev_desc->pan_id) ||
1649 nla_put_le16(msg, NL802154_DEV_ATTR_SHORT_ADDR,
1650 dev_desc->short_addr) ||
1651 nla_put_le64(msg, NL802154_DEV_ATTR_EXTENDED_ADDR,
1652 dev_desc->hwaddr, NL802154_DEV_ATTR_PAD) ||
1653 nla_put_u8(msg, NL802154_DEV_ATTR_SECLEVEL_EXEMPT,
1654 dev_desc->seclevel_exempt) ||
1655 nla_put_u32(msg, NL802154_DEV_ATTR_KEY_MODE, dev_desc->key_mode))
1656 goto nla_put_failure;
1657
1658 nla_nest_end(msg, nl_device);
1659 genlmsg_end(msg, hdr);
1660
1661 return 0;
1662
1663 nla_put_failure:
1664 genlmsg_cancel(msg, hdr);
1665 return -EMSGSIZE;
1666 }
1667
1668 static int
nl802154_dump_llsec_dev(struct sk_buff * skb,struct netlink_callback * cb)1669 nl802154_dump_llsec_dev(struct sk_buff *skb, struct netlink_callback *cb)
1670 {
1671 struct cfg802154_registered_device *rdev = NULL;
1672 struct ieee802154_llsec_device *dev;
1673 struct ieee802154_llsec_table *table;
1674 struct wpan_dev *wpan_dev;
1675 int err;
1676
1677 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1678 if (err)
1679 return err;
1680
1681 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
1682 err = skb->len;
1683 goto out_err;
1684 }
1685
1686 if (!wpan_dev->netdev) {
1687 err = -EINVAL;
1688 goto out_err;
1689 }
1690
1691 rdev_lock_llsec_table(rdev, wpan_dev);
1692 rdev_get_llsec_table(rdev, wpan_dev, &table);
1693
1694 /* TODO make it like station dump */
1695 if (cb->args[2])
1696 goto out;
1697
1698 list_for_each_entry(dev, &table->devices, list) {
1699 if (nl802154_send_device(skb, NL802154_CMD_NEW_SEC_LEVEL,
1700 NETLINK_CB(cb->skb).portid,
1701 cb->nlh->nlmsg_seq, NLM_F_MULTI,
1702 rdev, wpan_dev->netdev, dev) < 0) {
1703 /* TODO */
1704 err = -EIO;
1705 rdev_unlock_llsec_table(rdev, wpan_dev);
1706 goto out_err;
1707 }
1708 }
1709
1710 cb->args[2] = 1;
1711
1712 out:
1713 rdev_unlock_llsec_table(rdev, wpan_dev);
1714 err = skb->len;
1715 out_err:
1716 nl802154_finish_wpan_dev_dump(rdev);
1717
1718 return err;
1719 }
1720
1721 static const struct nla_policy nl802154_dev_policy[NL802154_DEV_ATTR_MAX + 1] = {
1722 [NL802154_DEV_ATTR_FRAME_COUNTER] = { NLA_U32 },
1723 [NL802154_DEV_ATTR_PAN_ID] = { .type = NLA_U16 },
1724 [NL802154_DEV_ATTR_SHORT_ADDR] = { .type = NLA_U16 },
1725 [NL802154_DEV_ATTR_EXTENDED_ADDR] = { .type = NLA_U64 },
1726 [NL802154_DEV_ATTR_SECLEVEL_EXEMPT] = { NLA_U8 },
1727 [NL802154_DEV_ATTR_KEY_MODE] = { NLA_U32 },
1728 };
1729
1730 static int
ieee802154_llsec_parse_device(struct nlattr * nla,struct ieee802154_llsec_device * dev)1731 ieee802154_llsec_parse_device(struct nlattr *nla,
1732 struct ieee802154_llsec_device *dev)
1733 {
1734 struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
1735
1736 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, nla, nl802154_dev_policy, NULL))
1737 return -EINVAL;
1738
1739 memset(dev, 0, sizeof(*dev));
1740
1741 if (!attrs[NL802154_DEV_ATTR_FRAME_COUNTER] ||
1742 !attrs[NL802154_DEV_ATTR_PAN_ID] ||
1743 !attrs[NL802154_DEV_ATTR_SHORT_ADDR] ||
1744 !attrs[NL802154_DEV_ATTR_EXTENDED_ADDR] ||
1745 !attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT] ||
1746 !attrs[NL802154_DEV_ATTR_KEY_MODE])
1747 return -EINVAL;
1748
1749 /* TODO be32 */
1750 dev->frame_counter = nla_get_u32(attrs[NL802154_DEV_ATTR_FRAME_COUNTER]);
1751 dev->pan_id = nla_get_le16(attrs[NL802154_DEV_ATTR_PAN_ID]);
1752 dev->short_addr = nla_get_le16(attrs[NL802154_DEV_ATTR_SHORT_ADDR]);
1753 /* TODO rename hwaddr to extended_addr */
1754 dev->hwaddr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
1755 dev->seclevel_exempt = nla_get_u8(attrs[NL802154_DEV_ATTR_SECLEVEL_EXEMPT]);
1756 dev->key_mode = nla_get_u32(attrs[NL802154_DEV_ATTR_KEY_MODE]);
1757
1758 if (dev->key_mode > NL802154_DEVKEY_MAX ||
1759 (dev->seclevel_exempt != 0 && dev->seclevel_exempt != 1))
1760 return -EINVAL;
1761
1762 return 0;
1763 }
1764
nl802154_add_llsec_dev(struct sk_buff * skb,struct genl_info * info)1765 static int nl802154_add_llsec_dev(struct sk_buff *skb, struct genl_info *info)
1766 {
1767 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1768 struct net_device *dev = info->user_ptr[1];
1769 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1770 struct ieee802154_llsec_device dev_desc;
1771
1772 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1773 return -EOPNOTSUPP;
1774
1775 if (ieee802154_llsec_parse_device(info->attrs[NL802154_ATTR_SEC_DEVICE],
1776 &dev_desc) < 0)
1777 return -EINVAL;
1778
1779 return rdev_add_device(rdev, wpan_dev, &dev_desc);
1780 }
1781
nl802154_del_llsec_dev(struct sk_buff * skb,struct genl_info * info)1782 static int nl802154_del_llsec_dev(struct sk_buff *skb, struct genl_info *info)
1783 {
1784 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1785 struct net_device *dev = info->user_ptr[1];
1786 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1787 struct nlattr *attrs[NL802154_DEV_ATTR_MAX + 1];
1788 __le64 extended_addr;
1789
1790 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1791 return -EOPNOTSUPP;
1792
1793 if (!info->attrs[NL802154_ATTR_SEC_DEVICE] ||
1794 nla_parse_nested_deprecated(attrs, NL802154_DEV_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVICE], nl802154_dev_policy, info->extack))
1795 return -EINVAL;
1796
1797 if (!attrs[NL802154_DEV_ATTR_EXTENDED_ADDR])
1798 return -EINVAL;
1799
1800 extended_addr = nla_get_le64(attrs[NL802154_DEV_ATTR_EXTENDED_ADDR]);
1801 return rdev_del_device(rdev, wpan_dev, extended_addr);
1802 }
1803
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)1804 static int nl802154_send_devkey(struct sk_buff *msg, u32 cmd, u32 portid,
1805 u32 seq, int flags,
1806 struct cfg802154_registered_device *rdev,
1807 struct net_device *dev, __le64 extended_addr,
1808 const struct ieee802154_llsec_device_key *devkey)
1809 {
1810 void *hdr;
1811 struct nlattr *nl_devkey, *nl_key_id;
1812
1813 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1814 if (!hdr)
1815 return -ENOBUFS;
1816
1817 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1818 goto nla_put_failure;
1819
1820 nl_devkey = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_DEVKEY);
1821 if (!nl_devkey)
1822 goto nla_put_failure;
1823
1824 if (nla_put_le64(msg, NL802154_DEVKEY_ATTR_EXTENDED_ADDR,
1825 extended_addr, NL802154_DEVKEY_ATTR_PAD) ||
1826 nla_put_u32(msg, NL802154_DEVKEY_ATTR_FRAME_COUNTER,
1827 devkey->frame_counter))
1828 goto nla_put_failure;
1829
1830 nl_key_id = nla_nest_start_noflag(msg, NL802154_DEVKEY_ATTR_ID);
1831 if (!nl_key_id)
1832 goto nla_put_failure;
1833
1834 if (ieee802154_llsec_send_key_id(msg, &devkey->key_id) < 0)
1835 goto nla_put_failure;
1836
1837 nla_nest_end(msg, nl_key_id);
1838 nla_nest_end(msg, nl_devkey);
1839 genlmsg_end(msg, hdr);
1840
1841 return 0;
1842
1843 nla_put_failure:
1844 genlmsg_cancel(msg, hdr);
1845 return -EMSGSIZE;
1846 }
1847
1848 static int
nl802154_dump_llsec_devkey(struct sk_buff * skb,struct netlink_callback * cb)1849 nl802154_dump_llsec_devkey(struct sk_buff *skb, struct netlink_callback *cb)
1850 {
1851 struct cfg802154_registered_device *rdev = NULL;
1852 struct ieee802154_llsec_device_key *kpos;
1853 struct ieee802154_llsec_device *dpos;
1854 struct ieee802154_llsec_table *table;
1855 struct wpan_dev *wpan_dev;
1856 int err;
1857
1858 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
1859 if (err)
1860 return err;
1861
1862 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
1863 err = skb->len;
1864 goto out_err;
1865 }
1866
1867 if (!wpan_dev->netdev) {
1868 err = -EINVAL;
1869 goto out_err;
1870 }
1871
1872 rdev_lock_llsec_table(rdev, wpan_dev);
1873 rdev_get_llsec_table(rdev, wpan_dev, &table);
1874
1875 /* TODO make it like station dump */
1876 if (cb->args[2])
1877 goto out;
1878
1879 /* TODO look if remove devkey and do some nested attribute */
1880 list_for_each_entry(dpos, &table->devices, list) {
1881 list_for_each_entry(kpos, &dpos->keys, list) {
1882 if (nl802154_send_devkey(skb,
1883 NL802154_CMD_NEW_SEC_LEVEL,
1884 NETLINK_CB(cb->skb).portid,
1885 cb->nlh->nlmsg_seq,
1886 NLM_F_MULTI, rdev,
1887 wpan_dev->netdev,
1888 dpos->hwaddr,
1889 kpos) < 0) {
1890 /* TODO */
1891 err = -EIO;
1892 rdev_unlock_llsec_table(rdev, wpan_dev);
1893 goto out_err;
1894 }
1895 }
1896 }
1897
1898 cb->args[2] = 1;
1899
1900 out:
1901 rdev_unlock_llsec_table(rdev, wpan_dev);
1902 err = skb->len;
1903 out_err:
1904 nl802154_finish_wpan_dev_dump(rdev);
1905
1906 return err;
1907 }
1908
1909 static const struct nla_policy nl802154_devkey_policy[NL802154_DEVKEY_ATTR_MAX + 1] = {
1910 [NL802154_DEVKEY_ATTR_FRAME_COUNTER] = { NLA_U32 },
1911 [NL802154_DEVKEY_ATTR_EXTENDED_ADDR] = { NLA_U64 },
1912 [NL802154_DEVKEY_ATTR_ID] = { NLA_NESTED },
1913 };
1914
nl802154_add_llsec_devkey(struct sk_buff * skb,struct genl_info * info)1915 static int nl802154_add_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
1916 {
1917 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1918 struct net_device *dev = info->user_ptr[1];
1919 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1920 struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
1921 struct ieee802154_llsec_device_key key;
1922 __le64 extended_addr;
1923
1924 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1925 return -EOPNOTSUPP;
1926
1927 if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
1928 nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack) < 0)
1929 return -EINVAL;
1930
1931 if (!attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER] ||
1932 !attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
1933 return -EINVAL;
1934
1935 /* TODO change key.id ? */
1936 if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
1937 &key.key_id) < 0)
1938 return -ENOBUFS;
1939
1940 /* TODO be32 */
1941 key.frame_counter = nla_get_u32(attrs[NL802154_DEVKEY_ATTR_FRAME_COUNTER]);
1942 /* TODO change naming hwaddr -> extended_addr
1943 * check unique identifier short+pan OR extended_addr
1944 */
1945 extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
1946 return rdev_add_devkey(rdev, wpan_dev, extended_addr, &key);
1947 }
1948
nl802154_del_llsec_devkey(struct sk_buff * skb,struct genl_info * info)1949 static int nl802154_del_llsec_devkey(struct sk_buff *skb, struct genl_info *info)
1950 {
1951 struct cfg802154_registered_device *rdev = info->user_ptr[0];
1952 struct net_device *dev = info->user_ptr[1];
1953 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
1954 struct nlattr *attrs[NL802154_DEVKEY_ATTR_MAX + 1];
1955 struct ieee802154_llsec_device_key key;
1956 __le64 extended_addr;
1957
1958 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
1959 return -EOPNOTSUPP;
1960
1961 if (!info->attrs[NL802154_ATTR_SEC_DEVKEY] ||
1962 nla_parse_nested_deprecated(attrs, NL802154_DEVKEY_ATTR_MAX, info->attrs[NL802154_ATTR_SEC_DEVKEY], nl802154_devkey_policy, info->extack))
1963 return -EINVAL;
1964
1965 if (!attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR])
1966 return -EINVAL;
1967
1968 /* TODO change key.id ? */
1969 if (ieee802154_llsec_parse_key_id(attrs[NL802154_DEVKEY_ATTR_ID],
1970 &key.key_id) < 0)
1971 return -ENOBUFS;
1972
1973 /* TODO change naming hwaddr -> extended_addr
1974 * check unique identifier short+pan OR extended_addr
1975 */
1976 extended_addr = nla_get_le64(attrs[NL802154_DEVKEY_ATTR_EXTENDED_ADDR]);
1977 return rdev_del_devkey(rdev, wpan_dev, extended_addr, &key);
1978 }
1979
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)1980 static int nl802154_send_seclevel(struct sk_buff *msg, u32 cmd, u32 portid,
1981 u32 seq, int flags,
1982 struct cfg802154_registered_device *rdev,
1983 struct net_device *dev,
1984 const struct ieee802154_llsec_seclevel *sl)
1985 {
1986 void *hdr;
1987 struct nlattr *nl_seclevel;
1988
1989 hdr = nl802154hdr_put(msg, portid, seq, flags, cmd);
1990 if (!hdr)
1991 return -ENOBUFS;
1992
1993 if (nla_put_u32(msg, NL802154_ATTR_IFINDEX, dev->ifindex))
1994 goto nla_put_failure;
1995
1996 nl_seclevel = nla_nest_start_noflag(msg, NL802154_ATTR_SEC_LEVEL);
1997 if (!nl_seclevel)
1998 goto nla_put_failure;
1999
2000 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_FRAME, sl->frame_type) ||
2001 nla_put_u32(msg, NL802154_SECLEVEL_ATTR_LEVELS, sl->sec_levels) ||
2002 nla_put_u8(msg, NL802154_SECLEVEL_ATTR_DEV_OVERRIDE,
2003 sl->device_override))
2004 goto nla_put_failure;
2005
2006 if (sl->frame_type == NL802154_FRAME_CMD) {
2007 if (nla_put_u32(msg, NL802154_SECLEVEL_ATTR_CMD_FRAME,
2008 sl->cmd_frame_id))
2009 goto nla_put_failure;
2010 }
2011
2012 nla_nest_end(msg, nl_seclevel);
2013 genlmsg_end(msg, hdr);
2014
2015 return 0;
2016
2017 nla_put_failure:
2018 genlmsg_cancel(msg, hdr);
2019 return -EMSGSIZE;
2020 }
2021
2022 static int
nl802154_dump_llsec_seclevel(struct sk_buff * skb,struct netlink_callback * cb)2023 nl802154_dump_llsec_seclevel(struct sk_buff *skb, struct netlink_callback *cb)
2024 {
2025 struct cfg802154_registered_device *rdev = NULL;
2026 struct ieee802154_llsec_seclevel *sl;
2027 struct ieee802154_llsec_table *table;
2028 struct wpan_dev *wpan_dev;
2029 int err;
2030
2031 err = nl802154_prepare_wpan_dev_dump(skb, cb, &rdev, &wpan_dev);
2032 if (err)
2033 return err;
2034
2035 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR) {
2036 err = skb->len;
2037 goto out_err;
2038 }
2039
2040 if (!wpan_dev->netdev) {
2041 err = -EINVAL;
2042 goto out_err;
2043 }
2044
2045 rdev_lock_llsec_table(rdev, wpan_dev);
2046 rdev_get_llsec_table(rdev, wpan_dev, &table);
2047
2048 /* TODO make it like station dump */
2049 if (cb->args[2])
2050 goto out;
2051
2052 list_for_each_entry(sl, &table->security_levels, list) {
2053 if (nl802154_send_seclevel(skb, NL802154_CMD_NEW_SEC_LEVEL,
2054 NETLINK_CB(cb->skb).portid,
2055 cb->nlh->nlmsg_seq, NLM_F_MULTI,
2056 rdev, wpan_dev->netdev, sl) < 0) {
2057 /* TODO */
2058 err = -EIO;
2059 rdev_unlock_llsec_table(rdev, wpan_dev);
2060 goto out_err;
2061 }
2062 }
2063
2064 cb->args[2] = 1;
2065
2066 out:
2067 rdev_unlock_llsec_table(rdev, wpan_dev);
2068 err = skb->len;
2069 out_err:
2070 nl802154_finish_wpan_dev_dump(rdev);
2071
2072 return err;
2073 }
2074
2075 static const struct nla_policy nl802154_seclevel_policy[NL802154_SECLEVEL_ATTR_MAX + 1] = {
2076 [NL802154_SECLEVEL_ATTR_LEVELS] = { .type = NLA_U8 },
2077 [NL802154_SECLEVEL_ATTR_FRAME] = { .type = NLA_U32 },
2078 [NL802154_SECLEVEL_ATTR_CMD_FRAME] = { .type = NLA_U32 },
2079 [NL802154_SECLEVEL_ATTR_DEV_OVERRIDE] = { .type = NLA_U8 },
2080 };
2081
2082 static int
llsec_parse_seclevel(struct nlattr * nla,struct ieee802154_llsec_seclevel * sl)2083 llsec_parse_seclevel(struct nlattr *nla, struct ieee802154_llsec_seclevel *sl)
2084 {
2085 struct nlattr *attrs[NL802154_SECLEVEL_ATTR_MAX + 1];
2086
2087 if (!nla || nla_parse_nested_deprecated(attrs, NL802154_SECLEVEL_ATTR_MAX, nla, nl802154_seclevel_policy, NULL))
2088 return -EINVAL;
2089
2090 memset(sl, 0, sizeof(*sl));
2091
2092 if (!attrs[NL802154_SECLEVEL_ATTR_LEVELS] ||
2093 !attrs[NL802154_SECLEVEL_ATTR_FRAME] ||
2094 !attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE])
2095 return -EINVAL;
2096
2097 sl->sec_levels = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_LEVELS]);
2098 sl->frame_type = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_FRAME]);
2099 sl->device_override = nla_get_u8(attrs[NL802154_SECLEVEL_ATTR_DEV_OVERRIDE]);
2100 if (sl->frame_type > NL802154_FRAME_MAX ||
2101 (sl->device_override != 0 && sl->device_override != 1))
2102 return -EINVAL;
2103
2104 if (sl->frame_type == NL802154_FRAME_CMD) {
2105 if (!attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME])
2106 return -EINVAL;
2107
2108 sl->cmd_frame_id = nla_get_u32(attrs[NL802154_SECLEVEL_ATTR_CMD_FRAME]);
2109 if (sl->cmd_frame_id > NL802154_CMD_FRAME_MAX)
2110 return -EINVAL;
2111 }
2112
2113 return 0;
2114 }
2115
nl802154_add_llsec_seclevel(struct sk_buff * skb,struct genl_info * info)2116 static int nl802154_add_llsec_seclevel(struct sk_buff *skb,
2117 struct genl_info *info)
2118 {
2119 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2120 struct net_device *dev = info->user_ptr[1];
2121 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2122 struct ieee802154_llsec_seclevel sl;
2123
2124 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2125 return -EOPNOTSUPP;
2126
2127 if (llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2128 &sl) < 0)
2129 return -EINVAL;
2130
2131 return rdev_add_seclevel(rdev, wpan_dev, &sl);
2132 }
2133
nl802154_del_llsec_seclevel(struct sk_buff * skb,struct genl_info * info)2134 static int nl802154_del_llsec_seclevel(struct sk_buff *skb,
2135 struct genl_info *info)
2136 {
2137 struct cfg802154_registered_device *rdev = info->user_ptr[0];
2138 struct net_device *dev = info->user_ptr[1];
2139 struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
2140 struct ieee802154_llsec_seclevel sl;
2141
2142 if (wpan_dev->iftype == NL802154_IFTYPE_MONITOR)
2143 return -EOPNOTSUPP;
2144
2145 if (!info->attrs[NL802154_ATTR_SEC_LEVEL] ||
2146 llsec_parse_seclevel(info->attrs[NL802154_ATTR_SEC_LEVEL],
2147 &sl) < 0)
2148 return -EINVAL;
2149
2150 return rdev_del_seclevel(rdev, wpan_dev, &sl);
2151 }
2152 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2153
2154 #define NL802154_FLAG_NEED_WPAN_PHY 0x01
2155 #define NL802154_FLAG_NEED_NETDEV 0x02
2156 #define NL802154_FLAG_NEED_RTNL 0x04
2157 #define NL802154_FLAG_CHECK_NETDEV_UP 0x08
2158 #define NL802154_FLAG_NEED_NETDEV_UP (NL802154_FLAG_NEED_NETDEV |\
2159 NL802154_FLAG_CHECK_NETDEV_UP)
2160 #define NL802154_FLAG_NEED_WPAN_DEV 0x10
2161 #define NL802154_FLAG_NEED_WPAN_DEV_UP (NL802154_FLAG_NEED_WPAN_DEV |\
2162 NL802154_FLAG_CHECK_NETDEV_UP)
2163
nl802154_pre_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)2164 static int nl802154_pre_doit(const struct genl_ops *ops, struct sk_buff *skb,
2165 struct genl_info *info)
2166 {
2167 struct cfg802154_registered_device *rdev;
2168 struct wpan_dev *wpan_dev;
2169 struct net_device *dev;
2170 bool rtnl = ops->internal_flags & NL802154_FLAG_NEED_RTNL;
2171
2172 if (rtnl)
2173 rtnl_lock();
2174
2175 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_PHY) {
2176 rdev = cfg802154_get_dev_from_info(genl_info_net(info), info);
2177 if (IS_ERR(rdev)) {
2178 if (rtnl)
2179 rtnl_unlock();
2180 return PTR_ERR(rdev);
2181 }
2182 info->user_ptr[0] = rdev;
2183 } else if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV ||
2184 ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2185 ASSERT_RTNL();
2186 wpan_dev = __cfg802154_wpan_dev_from_attrs(genl_info_net(info),
2187 info->attrs);
2188 if (IS_ERR(wpan_dev)) {
2189 if (rtnl)
2190 rtnl_unlock();
2191 return PTR_ERR(wpan_dev);
2192 }
2193
2194 dev = wpan_dev->netdev;
2195 rdev = wpan_phy_to_rdev(wpan_dev->wpan_phy);
2196
2197 if (ops->internal_flags & NL802154_FLAG_NEED_NETDEV) {
2198 if (!dev) {
2199 if (rtnl)
2200 rtnl_unlock();
2201 return -EINVAL;
2202 }
2203
2204 info->user_ptr[1] = dev;
2205 } else {
2206 info->user_ptr[1] = wpan_dev;
2207 }
2208
2209 if (dev) {
2210 if (ops->internal_flags & NL802154_FLAG_CHECK_NETDEV_UP &&
2211 !netif_running(dev)) {
2212 if (rtnl)
2213 rtnl_unlock();
2214 return -ENETDOWN;
2215 }
2216
2217 dev_hold(dev);
2218 }
2219
2220 info->user_ptr[0] = rdev;
2221 }
2222
2223 return 0;
2224 }
2225
nl802154_post_doit(const struct genl_ops * ops,struct sk_buff * skb,struct genl_info * info)2226 static void nl802154_post_doit(const struct genl_ops *ops, struct sk_buff *skb,
2227 struct genl_info *info)
2228 {
2229 if (info->user_ptr[1]) {
2230 if (ops->internal_flags & NL802154_FLAG_NEED_WPAN_DEV) {
2231 struct wpan_dev *wpan_dev = info->user_ptr[1];
2232
2233 if (wpan_dev->netdev)
2234 dev_put(wpan_dev->netdev);
2235 } else {
2236 dev_put(info->user_ptr[1]);
2237 }
2238 }
2239
2240 if (ops->internal_flags & NL802154_FLAG_NEED_RTNL)
2241 rtnl_unlock();
2242 }
2243
2244 static const struct genl_ops nl802154_ops[] = {
2245 {
2246 .cmd = NL802154_CMD_GET_WPAN_PHY,
2247 .validate = GENL_DONT_VALIDATE_STRICT |
2248 GENL_DONT_VALIDATE_DUMP_STRICT,
2249 .doit = nl802154_get_wpan_phy,
2250 .dumpit = nl802154_dump_wpan_phy,
2251 .done = nl802154_dump_wpan_phy_done,
2252 /* can be retrieved by unprivileged users */
2253 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2254 NL802154_FLAG_NEED_RTNL,
2255 },
2256 {
2257 .cmd = NL802154_CMD_GET_INTERFACE,
2258 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2259 .doit = nl802154_get_interface,
2260 .dumpit = nl802154_dump_interface,
2261 /* can be retrieved by unprivileged users */
2262 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2263 NL802154_FLAG_NEED_RTNL,
2264 },
2265 {
2266 .cmd = NL802154_CMD_NEW_INTERFACE,
2267 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2268 .doit = nl802154_new_interface,
2269 .flags = GENL_ADMIN_PERM,
2270 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2271 NL802154_FLAG_NEED_RTNL,
2272 },
2273 {
2274 .cmd = NL802154_CMD_DEL_INTERFACE,
2275 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2276 .doit = nl802154_del_interface,
2277 .flags = GENL_ADMIN_PERM,
2278 .internal_flags = NL802154_FLAG_NEED_WPAN_DEV |
2279 NL802154_FLAG_NEED_RTNL,
2280 },
2281 {
2282 .cmd = NL802154_CMD_SET_CHANNEL,
2283 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2284 .doit = nl802154_set_channel,
2285 .flags = GENL_ADMIN_PERM,
2286 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2287 NL802154_FLAG_NEED_RTNL,
2288 },
2289 {
2290 .cmd = NL802154_CMD_SET_CCA_MODE,
2291 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2292 .doit = nl802154_set_cca_mode,
2293 .flags = GENL_ADMIN_PERM,
2294 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2295 NL802154_FLAG_NEED_RTNL,
2296 },
2297 {
2298 .cmd = NL802154_CMD_SET_CCA_ED_LEVEL,
2299 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2300 .doit = nl802154_set_cca_ed_level,
2301 .flags = GENL_ADMIN_PERM,
2302 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2303 NL802154_FLAG_NEED_RTNL,
2304 },
2305 {
2306 .cmd = NL802154_CMD_SET_TX_POWER,
2307 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2308 .doit = nl802154_set_tx_power,
2309 .flags = GENL_ADMIN_PERM,
2310 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2311 NL802154_FLAG_NEED_RTNL,
2312 },
2313 {
2314 .cmd = NL802154_CMD_SET_WPAN_PHY_NETNS,
2315 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2316 .doit = nl802154_wpan_phy_netns,
2317 .flags = GENL_ADMIN_PERM,
2318 .internal_flags = NL802154_FLAG_NEED_WPAN_PHY |
2319 NL802154_FLAG_NEED_RTNL,
2320 },
2321 {
2322 .cmd = NL802154_CMD_SET_PAN_ID,
2323 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2324 .doit = nl802154_set_pan_id,
2325 .flags = GENL_ADMIN_PERM,
2326 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2327 NL802154_FLAG_NEED_RTNL,
2328 },
2329 {
2330 .cmd = NL802154_CMD_SET_SHORT_ADDR,
2331 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2332 .doit = nl802154_set_short_addr,
2333 .flags = GENL_ADMIN_PERM,
2334 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2335 NL802154_FLAG_NEED_RTNL,
2336 },
2337 {
2338 .cmd = NL802154_CMD_SET_BACKOFF_EXPONENT,
2339 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2340 .doit = nl802154_set_backoff_exponent,
2341 .flags = GENL_ADMIN_PERM,
2342 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2343 NL802154_FLAG_NEED_RTNL,
2344 },
2345 {
2346 .cmd = NL802154_CMD_SET_MAX_CSMA_BACKOFFS,
2347 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2348 .doit = nl802154_set_max_csma_backoffs,
2349 .flags = GENL_ADMIN_PERM,
2350 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2351 NL802154_FLAG_NEED_RTNL,
2352 },
2353 {
2354 .cmd = NL802154_CMD_SET_MAX_FRAME_RETRIES,
2355 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2356 .doit = nl802154_set_max_frame_retries,
2357 .flags = GENL_ADMIN_PERM,
2358 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2359 NL802154_FLAG_NEED_RTNL,
2360 },
2361 {
2362 .cmd = NL802154_CMD_SET_LBT_MODE,
2363 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2364 .doit = nl802154_set_lbt_mode,
2365 .flags = GENL_ADMIN_PERM,
2366 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2367 NL802154_FLAG_NEED_RTNL,
2368 },
2369 {
2370 .cmd = NL802154_CMD_SET_ACKREQ_DEFAULT,
2371 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2372 .doit = nl802154_set_ackreq_default,
2373 .flags = GENL_ADMIN_PERM,
2374 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2375 NL802154_FLAG_NEED_RTNL,
2376 },
2377 #ifdef CONFIG_IEEE802154_NL802154_EXPERIMENTAL
2378 {
2379 .cmd = NL802154_CMD_SET_SEC_PARAMS,
2380 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2381 .doit = nl802154_set_llsec_params,
2382 .flags = GENL_ADMIN_PERM,
2383 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2384 NL802154_FLAG_NEED_RTNL,
2385 },
2386 {
2387 .cmd = NL802154_CMD_GET_SEC_KEY,
2388 .validate = GENL_DONT_VALIDATE_STRICT |
2389 GENL_DONT_VALIDATE_DUMP_STRICT,
2390 /* TODO .doit by matching key id? */
2391 .dumpit = nl802154_dump_llsec_key,
2392 .flags = GENL_ADMIN_PERM,
2393 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2394 NL802154_FLAG_NEED_RTNL,
2395 },
2396 {
2397 .cmd = NL802154_CMD_NEW_SEC_KEY,
2398 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2399 .doit = nl802154_add_llsec_key,
2400 .flags = GENL_ADMIN_PERM,
2401 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2402 NL802154_FLAG_NEED_RTNL,
2403 },
2404 {
2405 .cmd = NL802154_CMD_DEL_SEC_KEY,
2406 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2407 .doit = nl802154_del_llsec_key,
2408 .flags = GENL_ADMIN_PERM,
2409 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2410 NL802154_FLAG_NEED_RTNL,
2411 },
2412 /* TODO unique identifier must short+pan OR extended_addr */
2413 {
2414 .cmd = NL802154_CMD_GET_SEC_DEV,
2415 .validate = GENL_DONT_VALIDATE_STRICT |
2416 GENL_DONT_VALIDATE_DUMP_STRICT,
2417 /* TODO .doit by matching extended_addr? */
2418 .dumpit = nl802154_dump_llsec_dev,
2419 .flags = GENL_ADMIN_PERM,
2420 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2421 NL802154_FLAG_NEED_RTNL,
2422 },
2423 {
2424 .cmd = NL802154_CMD_NEW_SEC_DEV,
2425 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2426 .doit = nl802154_add_llsec_dev,
2427 .flags = GENL_ADMIN_PERM,
2428 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2429 NL802154_FLAG_NEED_RTNL,
2430 },
2431 {
2432 .cmd = NL802154_CMD_DEL_SEC_DEV,
2433 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2434 .doit = nl802154_del_llsec_dev,
2435 .flags = GENL_ADMIN_PERM,
2436 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2437 NL802154_FLAG_NEED_RTNL,
2438 },
2439 /* TODO remove complete devkey, put it as nested? */
2440 {
2441 .cmd = NL802154_CMD_GET_SEC_DEVKEY,
2442 .validate = GENL_DONT_VALIDATE_STRICT |
2443 GENL_DONT_VALIDATE_DUMP_STRICT,
2444 /* TODO doit by matching ??? */
2445 .dumpit = nl802154_dump_llsec_devkey,
2446 .flags = GENL_ADMIN_PERM,
2447 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2448 NL802154_FLAG_NEED_RTNL,
2449 },
2450 {
2451 .cmd = NL802154_CMD_NEW_SEC_DEVKEY,
2452 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2453 .doit = nl802154_add_llsec_devkey,
2454 .flags = GENL_ADMIN_PERM,
2455 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2456 NL802154_FLAG_NEED_RTNL,
2457 },
2458 {
2459 .cmd = NL802154_CMD_DEL_SEC_DEVKEY,
2460 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2461 .doit = nl802154_del_llsec_devkey,
2462 .flags = GENL_ADMIN_PERM,
2463 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2464 NL802154_FLAG_NEED_RTNL,
2465 },
2466 {
2467 .cmd = NL802154_CMD_GET_SEC_LEVEL,
2468 .validate = GENL_DONT_VALIDATE_STRICT |
2469 GENL_DONT_VALIDATE_DUMP_STRICT,
2470 /* TODO .doit by matching frame_type? */
2471 .dumpit = nl802154_dump_llsec_seclevel,
2472 .flags = GENL_ADMIN_PERM,
2473 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2474 NL802154_FLAG_NEED_RTNL,
2475 },
2476 {
2477 .cmd = NL802154_CMD_NEW_SEC_LEVEL,
2478 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2479 .doit = nl802154_add_llsec_seclevel,
2480 .flags = GENL_ADMIN_PERM,
2481 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2482 NL802154_FLAG_NEED_RTNL,
2483 },
2484 {
2485 .cmd = NL802154_CMD_DEL_SEC_LEVEL,
2486 .validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
2487 /* TODO match frame_type only? */
2488 .doit = nl802154_del_llsec_seclevel,
2489 .flags = GENL_ADMIN_PERM,
2490 .internal_flags = NL802154_FLAG_NEED_NETDEV |
2491 NL802154_FLAG_NEED_RTNL,
2492 },
2493 #endif /* CONFIG_IEEE802154_NL802154_EXPERIMENTAL */
2494 };
2495
2496 static struct genl_family nl802154_fam __ro_after_init = {
2497 .name = NL802154_GENL_NAME, /* have users key off the name instead */
2498 .hdrsize = 0, /* no private header */
2499 .version = 1, /* no particular meaning now */
2500 .maxattr = NL802154_ATTR_MAX,
2501 .policy = nl802154_policy,
2502 .netnsok = true,
2503 .pre_doit = nl802154_pre_doit,
2504 .post_doit = nl802154_post_doit,
2505 .module = THIS_MODULE,
2506 .ops = nl802154_ops,
2507 .n_ops = ARRAY_SIZE(nl802154_ops),
2508 .mcgrps = nl802154_mcgrps,
2509 .n_mcgrps = ARRAY_SIZE(nl802154_mcgrps),
2510 };
2511
2512 /* initialisation/exit functions */
nl802154_init(void)2513 int __init nl802154_init(void)
2514 {
2515 return genl_register_family(&nl802154_fam);
2516 }
2517
nl802154_exit(void)2518 void nl802154_exit(void)
2519 {
2520 genl_unregister_family(&nl802154_fam);
2521 }
2522